The chair is comfortable and was really easy to put together.  However, I have only had it for 2 months, I weight way less than the weight limit and the cylinder in the middle slowly gives.  The whole time I am working I feel myself slowly getting closer to the floor and   I have to get up 10-15 times throughout the day to raise the chair back up just so I can reach my desk.  Unfortunately, the return policy only lasts a month and I spent over $150 on this chair so I am stuck with it.