Soooo comfy. I was very nervous about doing this, as I was VERY comfortable in my old chair. It was different, but I have so much more back support, and the the 4D armrests are AMAZING. GET THE 4D ARMRESTS. However, I cannot recommend the locking wheels. I like to sit close to my desk, and when getting out, the arms will hit the desk. I like the height they add, but the locking mechanism is a hassle. Anyways. The chair is awesome, and I am very happy I purchased it.