Great customer service ! The chair came with damaged left arm holder , I contacted customer service, they offer me 30% discount, and seller sent me replacement in 3 days . 
This chair is very easy to assemble and good quality. Well worth a few extra bucks, especially for daily use.
Really comfortable seat, great contoured back, and adjustable in every way you could ever want, which is what we were looking for. After purchasing leather/bonded leather chairs and having them peel, we have decided this might be the perfect compromise. I'm still figuring out just how loose I want to make the tilt adjustment. I put it together myself accordding with assemble instructions, but it would be way faster and less awkward with help.