A warning on using the GPS.  I posted a long note a couple of months ago
after, as an experiment, using my GPS for 90% or better of the navigation on
a 4,000+ mile trip.  Find it for details.  But summed up there are three
major points to remember:
First, it can take you on a route you might not prefer so check your map
ahead of time. And find the option setting that you can tell to avid toll
roads (if you want to avoid toll roads).
Second, it can tale you to places that ain't there.  The POI (Points Of
Interest) files may have a place that is torn down.
And three, the POI files DON'T have everything or every option in them.  If
you are going to rely on the POI files in the GPS then do some online
research and find the many additional POI files that you can load into your
GPS and select by category.  Like one file out there that has ALL the Forest
Service campgrounds in the  US. (Or at least a whole bunch more than comes
with the GPS).  Campgrounds are one big shortcoming I've found.  Most listed
are commercial campgrounds and mamy of the commercial campgrounds are not in
the original POI files.

But, when it comes to finding a specific address in a strange town the GPS
is fantastic.