SIDIZT80 High Performance Ergonomic Swivel Chair (TN800HLDA - Light Gray): High Back w/Adjustable Headrest, Mesh Back w/Lumbar Support, 3-Way Adj. Arms/Seat Slide&Slope

I got this chair on black friday sale for $530-ish. Watched the vid (can that actor be any more robot-like?) Opened the box, nice clean, safely packed. Big box, lots of padding. There are only a few parts to put together. The wheels are already installed on the chair base, which is nice. Do what the vid shows and use the box to prop up the chair back upside down and slide the seat on.Here's where it gets interesting, and not in a good way. There are 4 SS-looking (I dont think they are) bolts with already-applied (which means hard and DRY) blue thread lock applied to the threads. All the bolt hardware supplied is better than the usual rice land pot metal hardware. The very generous-sized Allen wrench for these 4 bolts is more than adequate to allow your baby sister to deliver the required torque to get these installed to hold the seat to the seat back. BUT!!!!! in my chair, the holes for those bolts are poorly tapped (incompletely threaded). 3 of the supplied bolts got came to a full, HARD STOP about halfway to being fully seated. Yes they were the correct 4 bolts- there are only 1 set of 4 same-sized bolts, and two more longer ones for a different area. I checked the bolts they were fine, M6, 1.0 thread. The holes for them were just incompletely threaded, making a heck of a mess as not seating the bolts that go in these holes means your seat back/ seat area is gonna creak and squeak due to the play between these two major chair parts. Eventually the incomplete engagement will cause undue pressure on either the seat back or seat area and one will break when you stretch back some lazy afternooon.I had to break out my M6 1.0 tap and re-tap 3 of the holes, which fixed the problem 100%. Moral of my saga- if you don't know what a tap and die set is, this is not the chair for YOU!. And you'll have to commit to putting the chair together, get it all out, open the hardware baggy, just to test fit the holes to see if you got a "bad" one.Also, whats with the blue thread lock? Do we really need it? Pre-applied (dry) threadlock causes installation problems when the bolt or hole has anything but perfect fit.Chair looks sharp and better (has some weight, decent parts) than the $150 chairs. But IMO its worth maybe $375, if you really shop around. Ill update this review in a few weeks after I have some experience sitting in it.

Ok - here is the deal (*after a month of daily use in the chair*): This is the best chair in the mid-to-upper market that you can buy right now, hands down. Why? You get the wide adjustment features that come with a $1-2K chair (like a Herman Miller or Steelcase) but at a much more reasonable price point.How is that so? I think it is two things many of which others have mentioned): the company behind the T80 is a Korean startup; they are looking to take market share away from the bigger players (and to be honest - it's smart). In my 2-3 month's research, leading up to buying the chair, it's VERY hard to find a $500- $800 chair PERIOD. They seem to all be above 1K or below $300 that often break within a year. the second thing is: a majority of the chair is made up of sturdy plastic (don't let that shy away from a potential purchase like I initially did) where as the higher market chairs are all steel or carbon fiber. I was very weary of this second part (and how it would affect my buying decision) but truthfully - this thing is solid and well manufactured.Now, let's get on to the PROs and CONs:PROS:- If you can't adjust this chair (as I mentioned - very adjustable), something is literally wrong with your body. I am kidding but not so much. It has seat depth, height, tilt, tilt tension (how fast or slow you want the back to flex), tilt lock, and adjustable headrest (slight note about the headrest I will cover in CONS), and removable seat cushion for washing (!!! mind blown).-If you have a passionate hate for putting IKEA furniture together - this is your chair. 80% of the chair is already assembled out of the box. You just: put the caster wheels on base, put the whole set bed into base, attach the headrest: DONE. I love this - it's chimp simple. IMHO: Most chairs that break are due in part to how they are assembled (Arms rip off, wheels break, etc.). Not so here.-Absolutely Beautiful and ergonomic. I sat in this the first time and had a sigh of relief. You will get compliments from people (or I guess family members at the moment) about this chair. They really took the time to make it look good.CONS:*Note* - I am being particular because I am hard pressed to find any MAJOR problems with this chair. But these are slight annoyances.Seat cushion - The removable aspect is awesome, but I also think it causes an issue with the seat depth. There is a seat depth lock (to move the part you sit on, forward or back - irrespective of the back of the chair) that even when locked in place (against the back of the chair) - still causes the seat to move. Let me explain. The actual seat cushion has a fabric casing over it (so it can be taken off and cleaned). Over the month of use (moving my butt forward and back in the chair in front of my desk, again - with the seat depth locked in place), the fabric casing is getting loose. Think of it like a pillow case on a pillow; if the case is not taut relative to the pillow, and something (like your head) moves along the top of it - over time, the case loosens up. It's manageable right now - but I fear the fabric casing will get even looser and ill be sliding all around.Adjustable arms - the one thing I would correct on future models: make the arm rest pads move left or right (in or our - circular motion), relative to the sitter. Right now, you can adjust the arms up or down, and the pads on the arms forward and back, but if your elbows don't sit exactly how the chair wants you to sit - there is no adjustment for it.Headrest - many others mentioned this but I am unaffected (as I am 5'9) - but if you are over say 5'10-5'11, your head (even at the tallest headrest adjustment setting) will not rest squarely against the back (it is too short; it will come up to the back of your neck). So I would recommend this chair for 5'9 and below.Even with the CONs, would you buy this chair again? Absolutely - you bet. It's really hard to find a WELL DESIGNED chair in the market without spending a boat load of cash. If you look at this chair and say - that's a little pricey! think about how many $200 chairs that will break on you or hurt your back in the next 8-10 yrs (that is how long I plan to keep this chair). Give it a go - you won't be disappointed!

Update 07/27/2023:Lasting Quality---More than a year on and this is just as comfortable as it was when I received it. I decided to add a memory foam seat pad which I think has helped to improve my posture. For others unsure of what all of the knobs do, the LH side knob adjusts the reclining lock and the RH side knob adjusts the reclining resistance. My only gripe after spending some time in this chair is the hard plastic lumbar support. I will add a lumbar pillow instead.---Original review below---I have not had a very nice chair since I worked in an office, but because I now work from home and spend ~60% of my day in my office chair, I decided to upgrade from my cheap and very worn chair that had no adjustments besides height.I find it very difficult to justify the cost of some things like mattresses and chairs, but since I spend so much time in them anyways and I'm approaching 30, I knew I needed to start taking better care of my back and joints. As much as I would love to splurge on a $1500+ chair, this Sidiz T80 came in at half the cost of competing chairs, and I think this is easily as comfortable as any one of those competing brand's chairs I have had the pleasure of sitting in.It took me maybe 10 minutes to assemble including removing the wrapping from the box. The thing I struggled the most with was inserting the casters into the base, but once that was done, the rest was a breeze.There are a ton of adjustments, though I am not sure what the little knob stems on the side do yet. I know one controls whether and how far you can lean the chair back, but I'm not sure of the other.Only time will tell if this chair holds up, but first impressions tell me that this thing is solidly built.Side note: The casters are extremely quiet. So quiet that I can't tell if they're making any noise unless I'm really speeding across the office. Awesome!

For the price I expected this chair to be comfortable out of the box but it just wasn't for me. I have made a couple of modifications that made it much more comfortable and good enough to keep but still not perfect.The seat foam is just too thin or the foam needs to better quality. I am 5'10 150 and i could feel myself bottoming out and hitting the plastic after sitting a while and was getting sore. I bought a square of 1 inch furniture foam and stuffed it under and it has helped a good deal.The lumbar support I hate. Its a thin piece of plastic with metal bar and you can feel it dig into you no matter which height you adjust. I have two ruptured discs in my back so i might be more sensitive that most but it was too painful for me. I have tried two things here one I took the lumbar support completely out but then my back was bothering more so what i settled on was adding a piece of that same 1 inch furniture foam on top of the plastic. Its made the lumbar support feel better but still not perfect as the adding depth of the foam causes it to push in more but much better than without the foam.I have no issues with the other adjustments or mesh quality. Plenty of options for adjusting seat angle, height, armrests etc.I had a steelcase leap v2 that I ended up giving to my mother who is working from home and needed a new chair and I much prefer that chair and am still debating just buying that again for myself. I don't think this Sidiz is a bad chair but for the price I think they really need to address the seat cushion and lumbar support I am very surprised more reviews didn't complain about those.

I landed on the SIDIZ T80 because I saw it mentioned favorably in several reviews, one in particular stating it was great for tall people. At 6'2" (230lbs), I've found a lot of chairs are made for the average height and build, so I took the leap. It was easy enough to assemble, but — after deciding it wasn't for me — disassembly was a nightmare of a chore. In the end, very little felt quality or intentional, and it never felt worth even half the price tag. Avoid this one.Ergonomics / Function: I was looking for a chair with a forward tilt control, and this has it. The controls were all solid and easy to use. The armrests are highly adjustable, and I was actually surprised with how much I liked having that option (my last chair did not have this feature). The pros end here.Support: There is basic lumbar support. Nothing to write home about. The headrest is useless — it might as well not be there.Mesh back: This mesh is very fine to the degree that it's actually a bit sharp to the touch. Every time I sat in it, my shirt caught on it and exposed my skin to the mesh, which was highly annoying and uncomfortable.Seat: The foam felt very thin and cheap. My tailbone felt sore after only an hour of sitting. The fabric is washable, which is a nice touch, but you also have to avoid shorts or pants in any sort of slick material or you'll slide around. Plus, if you live anywhere hot, just skip fabric altogether and look for a mesh chair.Base / Wheels: The wheels were basic carpet casters and slid around a lot on my chair mat. The base is plastic.Assembly / Disassembly: Assembly was easy enough, but this chair was not made to be disassembled and returned. The base design made it impossible to remove the cylinder, and the headrest was terribly difficult to remove because the screws are covered by a logo panel you pop on during assembly.After the T80, I tried an Aeron B (too small), a Leap v2 (fabric too hot, padding too thin), Aeron C (seemed fine?), and a Mirra, which has been nigh perfect. But the T80? Not even close.