Been using for several months now. I initially sat down and thought I made a huge mistake, it's not like sitting on a comfy chair. I knew the return window would allow to to send back figured I'd sit in it for a few days. I'm 6'1 170lbs, WFH, roughly 9-10 hours a day spent in the chair. Initial impression was that my lower back didn't like the lumbar support at all, took it out (30 seconds total to remove) and noticed relief right away but it still didn't feel great after the first day, my entire body actually hurt. I was researching how to send it back from the couch that evening. Played with the settings and after the second day I still didn't like it at all. The third or 4th day I noticed my posture had started to improve due to the arm rests adjustability giving you many different seating options. I'd never used a recline function in any chair so I immediately shut it off. Decided to try it out and couldn't believe how great the ability to sit upright firm with stability so it doesn't fall back, then slightly recline if needed, I now use it all day without thinking about it. By the end of the first week I started breaking the box it came in down because there was no way I could ever see myself sitting in any other chair.I'm amazed at what this has done for my overall comfort even life outside of the chair. This was easily the best purchase I can recall making. I just wish I had done it sooner. The build quality is what you would expect when you're paying a lot. There's not a ton of padding (seems to be most higher end chairs), but it's an incredibly comfortable chair once you get used to it. I expect this chair to last a very long time, however, if I ever get wind they're discontinuing this chair or redesigning it, I'll be buying a backup V2 for sure.