Initial GM-510 GPS receiver

33% of reviews on Amazon.com give this product a positive rating.

My mother gave me one of these as a gift. Works ok, but often confuses itself. By this I mean it will actually tell you to make a U-turn, then after you drive a few yards it will again say "make a U turn". Only after you proceed in the proper...

Overall, I like the unit. It has a big screen that makes it easy to see. However, it doesn't pick up a signal inside my home or my work too well. Volume takes several pics to find. Volume should be located on the map screen. Manual isn't too good -...

bought one it was great untill it was time to upgrade it cost $100.00 and i really do not see any difference radio does not work card slot does not work called 3 times and no one calls back very disapointed with it when i bought it they stated it was...