I've had them on my truck for about three years. Install was easy, I used stainless bolts instead of the supplied hardware. When drilling, be sure to measure from both lower corners of the flaps to the ground to make sure they are straight, nothing looks worse than a set of crooked mud flaps, JMHO.
I also painted then sealed all the holes with silicone to avoid rust, some say don't use silicone on auto paint but I've never had a problem. Mine have the stainless weight on the bottom and look great. Another thing you might buy, if you haven't already, is a set of wheel liners, good protection and better looking with a set of mud flaps.
I highly recommend getting a good set of mud flaps and running boards, excellent protection against rock chips.
Good Luck,
Bill