Superflash waterproofedness (Look ma, a new word!) is actually kind of iffy. I've had 2 now. The first worked for most of a wet winter, but then gave up. The newer one seems to have a better seal and has laster for 1.5 seasons. Still, I wouldn't change it out for anything. If I have another problem with the SF, I'll just wrap tape around the seam to seal it better.