This chair is the most uncomfortable chair I've ever owned or used.  For the cost, I thought it would be great.  I've had it for 2 days and my neck, back and rear are extremely achy.  And of course, it is too big and heavy to return.  I spent another $100 on a pressure release seat cushion and support pillow to see if that helps.  Please DO NOT BUY this horrible office chair.  I blame myself for ordering one online.  Some things you should just NEVER order online.