Can you be more specific? Are you talking about the small specific purpose ones you hang off the window or the gps modules that plug into your car stereo? I've had both, prefer the window mounted ones. Didn't have much of a problem with the one in the MH, although it did have a tendency to send me on the back roads instead of the freeway. The one in my car tends to loose its place once in a while showing me I'm driving on the wrong side of the road, or through a lake.
1998 Class C Lazy Daze 26 1/2 island bed
banks intake/exhaust
wifi/4g/siriusXM/DTV/DirecTV/CB
2xGeorbital electric bike conversions