I've had the chair for about a week, maybe two.  As someone else stated, the lever to adjust the chair height is in a horrible place.  You can't help but be touching it with your leg; the slightest movement and the chair drops.  The casters all lay flat on the floor as long as they face the same way (e.g. all pointed forward); if one is in the opposite direction, it doesn't touch the floor and you're now able to rock the chair side to side.  The material covering the cushions is stapled underneath; there were 3 staples that weren't in properly which resulted me in cutting myself on 1 of them (I then removed the others and replaced them with my own staples).  The angles of the seat and knee pad aren't super when adjusted to an okay height for me (I'm 5'11").  I really wanted to like this chair, but in hindsight I would go for another one.  It isn't horrible, but not worth the money.  Knowing what I know now, I'd pay in the neighbourhood of 75-100 for it.  Anyways....my 2 cents.