It was very easy to assemble and took me 20 minutes. You can do it on your own, but it's quicker and easier with two people (the backrest weighs quite a bit and the other individual parts aren't exactly light either).

Bought for my son for his birthday. He says it is very comfortable, especially for sitting in for long periods of gaming.

This chair is absolutely comfortable to sit on. It's soft, the armrests are height adjustable which I can't confirm myself as I haven't tried it, but I'd like to point it out anyway) and the material always goes back to its original position. The cushion provides very good support when sitting and helps you sit up straight, which is comfortable for your back. The neck pillow is also very comfortable. The seat cushion itself is made of leather and looks very elegant.