I was a bit skeptical not being able to try this chair. However with mostly positive reviews I gave it shot. Definitely not disappointed with the purchase! I'm a student doing web development and sit 8+ hours a day; I don't feel any kind of back pain or circulation problems. I'd recommend this to others.
assembling it was much harder than you might think from looking at the diagram in the instruction book. It tells you to attach the arms to the base and then tighten them down but if you do that you can't properly seat the back of the chair in between the arms. You have to loosen the arms - but not too much or they'll fall off - first before you can get the back of the chair properly seated. The booklet should have said this but didn't thus causing needless frustration and time-wasting.
I tried it this chair in the store before purchasing it. And was completely AMAZED at his comfortable it was! I bought the Red/Black for my 12yr old Son aww gaming chair. I'm very pleased with the purchase and also with the wonderful staff that assembled the chair for us. Thank you so much!