I would stick to buying an atlas annually for the area you are in as opposed to upgrading the NAVI. Cost to benefit is much better, IMO, doing it that way. Of course, nothing beats vocal directions from the place you're trying to get to! You know....turn left at the barking dog, when you see the big rock turn right...that kinda stuff lol. Granted, I get "free" maps being a member of AAA so I always replace them on a yearly basis! I never really see much difference though from year to year, as not much new is being built for the most part.