been sitting in this chair today working from home. At work i have an Aeron chair so I am a little spoiled. Starting at 5 stars and subtracting. the lumbar support pokes in a little more than i would like. my back doesn't curve as much as some peoples. its not terrible though. minus .5 star the rest of the back is great. I like the adjust-ability of the armrests. the seat is comfortable. i bought this chair because of the mesh bottom. i really am not experiencing any hot spots on my legs or rear end. good stuff. the neck support hits my shoulders and doesn't adjust up or down. i didnt buy the chair for a neck support so that wasn't a feature i was looking for. I took it back off. so only minus another .5 star. I am 6'2" tall if that helps.
On the positive side this chair is immensely cooler than the leather one I had before. On the downsides at 6'-3" I can barely fit comfortably between the headrest and the seat. The front edge of the seat is far too firm - my legs actually get sore from sitting on it. Perhaps this will resolve itself over time as I wear in the chair. I like that the tension on the lean is adjustable.
Of course I literally just put this chair together so I have no long term experience with this chair and the future knows what kind of awful problems i may encounter later but as of now this is one of the most comfortable office chairs I've ever put my bod in and it was terribly easy to put together so if you have trouble with that kind of stuff this chair should be a no brainer for you. I can't even describe its comfort other than it being great for my back you just have to try it for yourself to truly understand. Also 7 year warranty according to the manual :D