This little unit has yet to let me down.  It's fairly easy to enter in new addresses or find points of interest, and even my maps from over two years ago have the majority of the roads I've ever needed.  The display and the notifications it gives are sufficient to make preparations for upcoming turns / exits before it's too late.  I rely on this little device when I'm out of town, and it has never disappointed.  I highly recommend the Garmin devices, I just wish they would charge less for updating your maps.