I've had mine for two months now. It's been through a couple of carwashes (I try to do most by hand), many torrential downpours, and even a nice golfball-sized hail storm. Not a single drop of water has leaked into the interior. My favorite part happened to be my boss telling me to grab a Kleenex box because I was going to start crying when I saw the hail coming down on the KK (I had only owned it for a week at that point). I actually started laughing because the hail was bouncing off the Skyslider like a trampoline and coming down onto the hood of his Denali. That KK is pretty tough - I only have three little dents in the hood and you really have to get the right angle and lighting to see them. The Denali, however, did not fare so well....
