Navigation system

We received a portable navigation system as a gift today. It looks pretty good and we will give it a try. I'm not sure how much use it would get day to day but my wife often gets lost, so it would probably be useful for her. I think there's only one way for me to get to work and back and 98% of that is on the freeway, but I guess if I need to get off the road somewhere and look for a 7-11, this would help.