I did a lot of research before buying this chair and I have to say $500 is a lot of money, however you get what you pay for and this is true with this chair. It is sooo comfortable, my backpain has gone and I can now work at my computer for hours instead of just 1 or 2. The chair was really easy to assemble, I did read some people have had problems with the chair falling from under them when leaning forward to pick stuff up of the ground, here's a tip may sure that one wheel is facing forward and that won't happen. Apart from that if you can afford $500 then I highly recommend this chair.