Very comfortable. Got this for my son for his birthday. He loves it! He had to get his Dad to help secure the bottom but other than that he was able to do it by himself.
The model in the store seemed more comfortable and it seems more difficult to lean back and the adjusting spring is difficult to turn. I should have purchased the more expensive larger chair.
I bought this chair off of a recommendation and I have to say for the price the chair is listed for it is the best bang for the buck Office Chair on the market. It is the most comfortable chair I have ever used it is even more comfortable than my at work chair which cost more than double what this chair did. I highly recommend to anyone that values comfort in their productive spaces.