I have the Westin, Platinum, wheel to wheel nerfs. There was no drilling. Bolts to the body mounts and uses "T" nuts to mount in the body slots. It's a pretty rigid installation and looks good.
I like the looks of the nerfs. More importantly, my wife preferred the looks of the nerfs to running boards. She's just over 5 feet and this is why they're on the truck. If it was just me, I wouldn't have anything as I'm 6' 3" and it's easy for me to get in and out. By the way, Dodge picked up most of the tab for the cost through the "Automobility" program. Because my short wife had knee surgery, her doctor said the nerfs would be a very good idea as jumping out of the truck would be hard on her knees.
The running boards would give you much more protection from paint chips than do nerfs. Also, if you drive in freezing rain/snow, you can build up enough ice that you won't be able to open your doors. I had to climb out a window and chip ice to get the doors open. It only happened once but was a real pain.
Bob