I have a GPS system built into my car, and I bought a portable one to take on trips when I am going to rent a car. I love them. I used to spend a lot of time lost in strange cities. Now I can get where I'm going easily and I feel free to drive around and explore if I have free time. Last summer I rented a car and drove around Maine. I just followed interesting roads and when I was ready to get back to my hotel (or wherever) I just input the address and had the GPS give me directions to wherever I had to be. Having a GPS system has made life much easier for me. I haven't had any problems with either of the systems I own and I feel much safer driving now than I ever did before.