I have owned and USED motorhomes since 1977. Years ago I bought a Brake Buddy, still have it and use it constantly. I don't remember how many years I've had it - lots. I don't remember how many vehicles I've used it in - lots. Don't remember how many motorhomes I've used it with - lots. It has been back to the factory several times, never broken, just inspect and repair as necessary. The only problem I've EVER had was to remember to pump down the power brakes - if I forget, it reminds me automatically at the first stop.
You decide.