Comfortable enough, however, there is a 1 inch gap between the bottom of the back rest and the seat cushion on my unit, which is within manufacturer tolerance but it means the chair is never in the fully upright position, and the backrest is angled too far back in the normal "chair" position. This makes the chair "too deep" meaning my knees, as someone who is 5-11, do not reach the end of the chair as would be normal and expected. My feet struggle to reach the ground when sat in the chair properly. I have to use poor posture in order for my feet to reach the ground