The chair is comfortable enough and went together easily. The reason for the low rating is the chair is rated for 330 lbs. I already have a drafting chair that is rated to 250 lbs and very slowly and subtly the cylinder would give bit by bit over the course of the day. So when I bought a chair that was rated to 330 lbs, I figured it would be rock steady but it is not. The hydraulics gives far more than my 250 lb rated chair which cost significantly less.