I've found that I stay pretty dry in my Cobra, as long as I keep my speed up.
I have used my top several times, not in the rain but in the cold. It sure beats the frozen ear syndrome. It's really simple to put mine up, now that I've done it a couple of times. Word of advice, though--make sure the lift-a-dot posts are snugly screwed into the body; if they're loose the action of the wind on the the top could cause the paint to lift around them--
Bob