Installed a Bedrug
It rained today in St. Louis. My new cover kept the bed 99.99% dry. There was a little dampness on the edge of the tailgate Bedrug that came in where the cracks in the tailgate are. Not a big deal really. So far I'm in love with the Bedrug and the Bakflip. I would highly recommend either to anyone.
Looks like I'm sold on the Backflip for my wife's Sport Trac. We've been contemplating some sort of bed cover for her truck since we're expecting a number 2 some time in the beginning of next year and she wants a place to put stuff out of the environment without buying a new vehicle.
I've had a bedrug in my truck for over a year now. VERY DURABLE and as mentioned by the OP, it is great on the knees. I thought it might make loading some objects a little difficult but I haven't had any issues yet. I had no issue sliding this 400lb toolbox crate to the front so I could secure it.
As the picture below shows, it can make for a great play pen in a pinch..

As the picture below shows, it can make for a great play pen in a pinch..





