had many garmins and have been very happy with them. The RV760 is nice, especially with the good backup camera they offer that interfaces with it. Good news/bad news is the display size. 7" is nice, but does somewhat limit suitable locations for it.
Routing wise, it has never let us down, has warned us a couple of times of what could have been a nasty problem when towing our 35' trailer. Has a nice list of campgrounds, etc. etc.
As with any GPS, common sense, previewing routes, and paper maps are always good things to do/have.