Mr. Rightlane
I used a P2 in my 4Runner when I towed a hybrid. NEVER had an ounce of trouble with it. When I got my Tundra it came with the plug in pigtail thing. I moved the P2 to the Tundra and hooked it up myself. It was quite easy. I am now towing a heavier trailer and it continues to work flawlessly. I really like the boost settings. When on the road and heading down hills I simply reach down and hit the boost button once. The added braking comes in nicely. It is easy to install, easy to set up and easy to adjust by using the boost. I would think that the P2 would cost less than a P3 but I am not sure.