I had a basic $30 Reese controller on my old truck and then upgraded to a Prodigy P3 which was much better. On the new RAM I added a factory brake controller. 1) I didn't feel there wasn't a great place to put the aftermarket controller that wouldn't get in the way, 2) the integrated brake controller looks much better with the slider on the dash 3) settings are done right on the truck's computer screen and 4) the controller integrates with your trucks existing ABS and Stability Control System. That 4th point was the biggest one for me. IF you ever get into a situation where sway gets out of hand, the truck's computer is supposed to recognize this and apply appropriate braking to both the truck (left/right) and trailer to bring everything back in line. An aftermarket brake controller cannot do this.