[rheavn]

I considered the M & G system also, but wouldn't fit on my vehicle.  From all I've heard it is a great system.  

I guess I am the dissenter here.  I have no problem tapping into the coach brake system.  You tap in where there is only air pressure when the brake is applied.  I tapped into the system at the right tag brake chamber.  I have towed now for over 100,000 problem free miles.   Tom & I also tapped into his coach's air system & have heard of no problems with his.