How about some current Garmin GPS 770 user comments, please...
Our RV770 is the third auto Garmin GPS we have owned. The first 2 were Nuvi 600 series units, a 4 inch screen and then a larger one with a POI for
overpass height warnings from lowclearance.com
which worked well.
When Garmin announced the RV770 one feature that I always wanted was the backup camera. Garmin offered a small credit for the Nuvi but we decided to keep it for the other car and as a back up in case the 770 needed repairs.
I called Garmin support to better understand the 770 routing logic.
The 770, when planning your route, takes into consideration your stored profile so you never see a low overpass warning because the software silently plans around obstacles. One precaution is if you are traveling without setting a planned destination and just observing you RV icon traveling down the road, you do not have low overpass advisories.
OK what about the backup camera operation and performance? First the camera display resolution is just OK. There are higher definition units on the market and Garmin missed their usual high quality mark with this option. However, I wanted to minimize the stuff in front of my windshield so the 770 fits this requirement just fine. The definition is good enough for me to see the area in back of the truck or RV.
A nice feature that sold me was that you can attach up to 4 backup cameras. We installed one on the truck and the second above the RV tag. The truck camera receives power for the truck backup light and is the default camera. That means that the camera display displays automatically when you are in reverse gear. It’s transmitter is located in the area in front of the tail light assembly.
I was concerned about the distance from the rear of the RV to the 770 in the truck so I got the transmitter extension cable to mount the transmitter in the landing gear cavity. To activate the RV camera I go into reverse and the backup display allows you to select other attached cameras.
Sometimes when a strange route is displayed, I check the alternate routing or just pull out the map to understand how the route came to be. All in all I like the number of features in the 770 and feel it is a good unit for RV enthusiasts.