One of my aunts has a Garmin unit in her GMC Yukon Denali and she loves it. She is in real estate and it has helped her out greatly in finding locations... a must for someone like her. My uncle (her husband) has one as well in his Dodge diesel truck (he is an electrician) and it has came in handy when he has nightly service calls trying to find a home whose heater or A/C has gone on the fritz on a dark night.

I have another uncle in Richmond that has one in his Lincoln Town Car that he likes better than the factory unit (his has the satellite radio as well).... my aunt (his wife) loved it so much that he had to install one in her Volvo and his daughters Mercedes 300TD. I think that entire household has one as well, as one was also installed in my cousins Land Cruiser and his brothers BMW 8-Series. All have mounted very easily onto the instrument panels.