We've run with the Garmin RV 760 for several years now, and it's worked well for us. Previously, we had a Garmin DEZL, which is the commercial truck version. While it did keep it out of tight spots (we're towing a fiver that is 13'6" tall), it limited us to streets and roads identified as municipal truck routes which, at times, took us quite a bit out of our way. Out of curiosity, I checked out the newer Garming RV 660 to see the difference between it and the 760. Looks to be featured very similarly, but the 660's screen is smaller than the oversized 760 which is a disadvantage for an old guy like me.
