I set the boost setting as recommended by Tekonsha.
As soon as the Prodigy senses significant deceleration the boost is basically no longer active.
If the gain is set as recommended by Tekonsha you will have full braking when stopping. No need to make any adjustments between city and highway.
If boost is set for size of trailer as recommended by Tekonsha and gain set properly you should never feel the trailer brakes when doing normal stopping in city or highway driving.
If you do then the controller is not set correctly.
I have used a P3 since it was first introduced with zero problems.