The woman in the article complained about being outside of cell coverage. I think having GPS on your cell phone can give you a false sense of security, because cell coverage is imperfect. Back roads in the woods are definitely an example of the sort of place where you might get lost. Correct me if I'm wrong, but I believe a dedicated GPS unit uses satellites, and as long as you get a clear line of sight to the sky, you should be able to get a signal. They have come down in price so much after facing competition from cell phones that they seem worth the money.