A:AnswerWeight limit 250 pounds. I have only had mine a couple of months, and have not had a chance to settle down and use it continuously for long periods yet, but it sits really comfortable for me - I am a fairly heavy woman. I'll be in it for hours doing my taxes in the next week, so I'll find out how many hours it remains comfy!
A:AnswerWhen I bought mine, the black one was cheapest. I wanted the ivory one, but it was out of stock. I think the price depends upon the demand at any given time. All the colors appear to be exactly the same, but I have only seen the black one in person.
A:AnswerYou tighten or loosen the tension for the back so it can rock back more or less. You turn a thing underneath the seat to accomplish this. Maybe that's what you mean by tilt.
A:AnswerThe seat depth is about 19.3 inches. I would like it better if this chair were a couple of inches deeper for fuller leg and body support, but it's still quite comfy, and I'm glad I bought it.