I got this chair for my son who is 6'4" and 220 Lbs. I was surprised that the head support could be adjusted higher to fit his frame after we brought it home and my husband put it together. It provides good support and my son is very happy with it. The only complaint that he has is the mesh part of the chair. After sitting on it for 4 hours straight the mesh was sticking to his legs. We placed a nice soft thin blanket on the chair and that solves the problem.
Excellent lumbar support. I didn’t install the arms or headrest. Not having arms allows chair to fit under my desk. I never lean my head back at my desk since I’m always working.