I didn't buy this but I rent a space that includes one and would buy it if I needed to.
I used to think that super high-end office chairs were a rip off, and I have always used mid-range (<$400) office chairs that were most of the time some kind of faux leather that would always tear or break after a few years.
I end up doing a lot of sitting while developing
GoalSumo.com throughout the day, and I used to always be (somewhat) sore after 2-3 hours of sitting at my desk.
While I'm not recommending this habit, I can easily sit in this chair for 6-7 hours without any issues or aches. I'm 23 so I'm guessing folks with a few more miles on the odometer might get even more benefit from one. My office space has these all over the place, and
they have never replaced one.
At first I thought that I wouldn't like these due to the fact that the backrest angle can't be adjusted, but as I've used it, it turns out it really didn't matter at all. I seriously think this chair is more comfortable than most couches and loveseats folks have in their living room.
According to Google lens, this is a
Herman Miller Cosm, and I looked around and saw that they were significantly cheaper than the Aeron chair most people recommend ( I think it's about $1000, less if used).
Bonus value: I recently purchased my first coffee mug as an adult (I don't drink coffee). I bought it as a little desk artwork piece more than anything, and it's been bringing me so many micro-doses of joy each day. I don't put anything in it, I just have it for show. It was $15 at a Google store.... It's the Google Chrome offline dinosaur game.
Every morning, I make a decsion if I want the dinosaur side or the buzzard side, sometimes I even flip it around at lunch time.