Dick,
We had the M&G system on our 2007 Honda CR-V and it worked flawlessly. When it was time to equip the new 2013 Honda CR-V, the M&G system didn't fit as well because the engine compartment had been redesigned. So, we installed the SMI Air Force One vacuum-assisted braking system which is very similar to the M&G.
I think the difference is that they cut into the firewall to attach a bracket that pulls the brake pedal down. Works perfectly.
The M&G could have been installed on the 2013 but the installer said because of the difference, it would take 8 hours labor vs. the 2-3 hr. labor of the SMI.
Both work off the air system from the coach.
Good luck,
MM.