What do you folks think of aluminum sided trailers?

We had several corrugated aluminum RV's. All leaked because of the undulating shape of the siding. It was impossible to stay ahead of the water intrusion, rot and mold. Had to take one of them straight to the dump.
Personally, now that I've had a couple of hard sided RV's (which have never leaked), I would never go back although I understand it's a price point issue for some.
They also have made some flat aluminum sided RV's that I think would be great.