gps tracking device

When we were in the States, I was rather impressed by how our cousin got around places with her gps tracking device. That was one cool item I would love to have since I am not very adventurous when it comes to driving to unfamiliar areas. It was cool to hear navigation and directions from the device and the information given was accurate and precise to the dot. DH mentions that you could still get lost if the device is used here cos the roads are not carefully mapped at this point. Or maybe it's just his excuse not to buy me one :P