I had the M&G braking system installed on my Jeep Wrangler last year. It is incredibly easy to hook up-- just one coiled air line with quick disconnects at both ends. After 17,000 miles of towing, the system has performed well, and I've had no problems with it.
This is the only braking system I've ever owned, so I cannot comment on how it performs compared to others. As far as I know, the only downside is that the system is vehicle specific. So, if you change toads, you may have to buy another system. However, I believe M&G has a "trade-in program" that helps one recoup some of the cost.
2014 Phaeton 40AH
2014 Jeep Grand Cherokee Ecodiesel