I gotta say, I'm very impressed. The install was easy (the only surprise was having to bend out the pins on the controller to fit the supplied truck-side pigtail) and it works great. The levels I used (L1 and L2) seemed to work as advertised.

I hooked up to my Haulmark and used L1 when it was empty, L2 when it was full of Jeep, dirtbikes, camping stuff, beer, etc. The controller was very smooth, gave adequate power on the different levels (you can add and subtract gain within a level), and didn't jerk when releasing the brakes after a stop. I didn't fool with storing user settings yet.

I like it. And Southwest Wheel gave excellent service.