I just decided to replace my old Hopkins proportional brake controller with the p3 after reading all the good reviews. I also want to be better informed on what's happening electrically with my brakes...
I have a P3 and will see a variety of readings depending on what pressure Im applying. Generally from under 2 to around 8'. I have to admit most of the time when I'm braking I don't have my eyes on the controller but what's in front of me. I've had it installed about 2 years and am very happy with it.