Mostly happy with my purchase. The chair is good value for price, and very comfortable. It was easy to put together by one person in just a few minutes. The only issue with the packaging is that it was supposed to include little covers for the screws on the arms, and they were not included. Do note that the arms may be too high to fit under your desk. That's a bit of an annoyance, but I'm used to it now. I don't find the chair to be hot, as one other reviewer mentioned. The only issue is that, as of about a week ago (I've had the chair for about 6 weeks), it doesn't maintain the adjusted height, but gradually sinks down to the lowest height. I have to raise it a few times each day. Not sure how this could be fixed.
LATER UPDATE: I feel like I should also add...I weigh about 56kg, so it's not like I'm too heavy for the chair to work properly. It's sinking more and more often now, and it's a bit annoying. I have to say at this point that I would not have purchased this chair had I known it would do this. Will have to get a fat cushion for the seat.
UPDATE SEPTEMBER 2012: I received a comment from the seller, offering a replacement gaslift. I contacted them on a Friday, and by Monday the gaslift had arrived. Unfortunately, it did not include instructions on how to replace it, and I had thrown away the original instructions. Thanks to this video [...]I figured it out. It's pretty simple in theory, but my husband had to help with hammering the gaslift away from the chair.