Cummins12V98 wrote:
"When on the road and heading down hills I simply reach down and hit the boost button once. The added braking comes in nicely. "
Sounds nice on paper!!! Having a panic situation with both hands on the wheel not always easy to reach down and hit the little button.
The quote was not using the boost in a panic situation. They simply like the trailer to lead the braking more on the downhill. In a panic situation it is no different than any other controller, built in or otherwise, you find the manual brake lever.