GPS Quit working. It states in the manual to always unplug it or unhook from the battery when not in use or charging.... But the shop ( which is a Certified Motorguide repair center) just put an inline automatic breaker when they put it in so it was getting power all the time. This Motorguide says caused the "circuit board"( whatever that is) to go bad. But they saw me talking about it on bbc board, and Motorguide's head of engineering e-mailed me Sunday night at 7pm with a phone number to call Monday morning to get it fixed. I think they wanted to shut me up as quick as possible as I was griping about it going out so soon on these boards... lol But they paid a shop to fix it and actually it may have not been installed according to directions, so I'm very pleased. If I'd installed it myself I'm not sure they would have been so understanding about it being plugged in all the time though.