I have installed the MG Brake system on a 1996 Jeep Grand Cherokee, a 2000 Jeep Grand Cherokee, and 2012 Ford F150 Eco Boost. The installation is not that big of a deal in terms of inserting the the brake between the master cylinder and the vacuum boost...
Each vehicle will be different... The F150 was the most involved...
The instructions from M&G are very detailed, the kits come will everything needed... In addition the M&G folks are very helpful if you call them...which I have on every installation...
I have somewhere in the vicinity of 300,000 miles of towing using the M&G brake system... Never had even the hint of a problem.
Aside from the performance of the brake system and its reliability, Hook up is basically connecting an air line.
Once installed there is no effect on the dingy brakes when driving the dinghy... You will not know its there.
If you opt for the break away.. The installation gets a bit more complicated depending on the real estate available to install the manifold and cylinder...
JohnnyT