I bought smittybilt seat covers from Quadratec (the deal where you get the back cover for free). I just put them on today, so they havent really been weather tested.
I can tell you that it was a major pain putting them on...they just barely fit and you really really have to pull to get them on.
Plus, they dont cover the entire seat. The corners are still exposed. And there were a few blemishes (black spots on the tan area). The more I buy from Quadratec, the more I dislike quadratec.