I'm 6'1" and 200lbs and this unit would be great if I were about 2-3" shorter. However I can feel the head rest with the top of my back and shoulders when sitting properly. Everything else is great though. I may be missing something that would allow me to raise the backrest to position the headrest higher but then I think the lumbar support would be too high... Like I said in the title good for the money.
I have a small frame. I enjoyed the chair at first but after using it almost two weeks while working from home I had lower back pain. The curvature of the seat messed with the alignment of my back. I'm returning in favor of a chair with a flat seat.