I have an old P.E. (before they called it JackRabbit) on my S-15 work truck. I like the versatility,
but the weatherproofing design could be better.
First, the side rails are too shallow to drain the cover during a heavy downpour. Take a turn,
the side rails fill up and sometimes water overflows into the bed.
Second, the roll-top seals to the tailgate with weather stripping. Normal acceleration
will collect water on the tailgate weather stripping. Again, water eventually leaks into the bed.
Hopefully, they've made improvements over the years. If so, I'd buy another.