I've only used mine a couple times and before this had never really used a nav system, I do a LOT of driving for work and would always use Mapquest. So far I really like the voice search, it's insanely accurate. However, like mentioned, the routes leave a lot to be desired. This is why I've always used Mapquest and not google maps, whatever code or algorithm or whatever they use is inferior to the one mapquest uses. I use Mapquest for directions 1-4 times a day for work, and it's wrong less than 1% of the time. I've used Google Nav maybe 6-10 times and it's already been wrong twice (these are not rural areas, not new streets... just normal roads in LA county, stuff that any nav program should handle with ease).