Read their contract carefully before you buy. Their contract essentially makes them god and you nothing.
It says they can do anything at any time and you can't do anything about it. Even though you always pay in advanced via credit card automatic debit, it says that if your credit card is declined for any reason (mine was declined because a new valid through date kicked in) that they can continue to bill you and if you don't pay they will turn you over to a collection agency. It says that you agree to pay all collection costs and that you cannot sue them.