I'm very pleased with this chair. I understand it has been only a week and that this can change. However at the moment I can only comment about the positive feelings I get when I sit on it!
After I assembled this chair I noticed that the casters are not rotating and rolling very well on our hardwood floor. I also had bought another chair before (Carden mesh chair) and I never have this problem with its casters. It seems to be some sort of design problem.
My office chair has seen better days and the sale last week came at the perfect time - a Christmas present to myself! The chair has just enough adjutments to make it fit me and is one of the tallest sitting chairs I've found. Both very important features.
I am enjoying my new chair I love the lumbar support the adjustable seat back the adjustable seat height and the adjustable arm rest. It moves around easily as well on the wheels and is firm comfortable and supportive.