I love my trinity. You can get mpg increase if you stay out of the gas, which I DO NOT..
I have fact gps and get no interfearance with it or anything else. there are two bundles of wire that have a clip on the ty-wrap that fit the cable perfectly (probably for the techs reader when they are testing) I use those clips and coil the excess wire into the magazine/map pocket in the side of the center console. I have the suction mount on the center upright trim just under the 4X4 switch. Yes its worth the $ IMHO. I would but it again in a heartbeat
Pic of mine in this thread, any other ?s I'd be glad to help. Also check out the diablo section lots of good info there