I've got the G2 Bakflip as well, and have had no issues what so ever. Great tonneau cover as far as I consider. The odd little bit of water by the tailgate, but everything else is great.

When putting in the tubes for the front drain, I used a hole saw to drill into the rubber plugs that are in the front of the box. It made a nice clean install of the drain hose, compared to just using a blade a making an X shape for the tube to slide into.

Best accessory that I've gotten yet....

 

Well I decided to go with an undercover. Got it installed yesterday and I think it looks great on the KR. I wanted a water tight cover, or as close to it as possible, that was lockable and very easy to take off when I need to. I'll try to get a picture of it over the weekend for those that are interested.