Got mine two days ago (Leader Orange), I was sick of having to replace my standard office store chair once a year. Unfortunately, I had a bent plastic cover, too, but other than that, quality seems to be quite alright. All parts and mounting holes lined up perfectly, the whole thing feels pretty solid.
Now I have to say that it doesn't seem any more comfortable than the cheapo versions at first, but I guess it'll stay that way much longer due to the quality design. With the others, I'd sit on the chipboard after only a few months with my butt hurting after a 2 hr session.