Do NOT get an RVND 5510. I wasted my money on one of those. While it has a lot of POI's, tons of info, RV Specific, and overall great when it works. That's the problem, it freezes up constantly, continues to tell me I will be on a dirt road in .6 miles even on a highway, and their customer service barely speaks English. Their solution to the problem is to always do a file repair. I have never had a GPS where the processor is so unstable it requires repeated file repairs. Especially handy when it freezes up and you are on the DC beltway. And finally it's heavy. Downright brick. Still keeps it from being too light for a boat anchor. Expensive paperweight. Now I use CoPilot app on my Iphone. Works great. The co pilot app is only about $10.00 if you download the maps. I'll never buy a gps again.