Anyone use these either of these tonneau? Love the idea of being able to cover my bed but at the same time being able to roll it up to use my bed. Roll n Lock is more expensive but having see it in person looks great. Rollbak is less expensive and I have heard good things about it. Only negitive is that it gets hot because of no coating over the aluminum. So anyone have either of these and can give a review? Water tight? Any problems with the roll up device? How well is it holding up?