I use this controller here:
I've had no issues with it, Easy to use and it works. You'll have to manually adjust the braking power for the trailer according to weight. This was my first time ever towing a trailer with electronic brakes and I had no issues.
You'll also need a dodge specific harness to connect the controller to the blue plug in the truck. The link above comes with the harness already. When I bought mine locally, they sold it to me separately.