I have been using M&G system with good results on my Tahoe. I also added their break-away kit. It amounts to a small tank mounted on my firewall. with a electric breakaway switch tethered to the coach. When the switch is pulled out it activates a solenoid valve sending the air in the small tank to the M&G brake cylinder and locks up the brakes on the tow vehicle bringing it to a safe stop. All of the items have been trouble free so far. Aprox. 5000 Mi. of use. One small tether cord and one 1/4" air line to couple to the coach and your on your way. See M&G internet site.
Harry
Shirley & Harry / 2000 Liberty / 2008 GMC Envoy Denali