Alpine PMDB100 Blackbird Factory Renewed Portable Navigation System
I just returned from a 4,128 mile trip in our new (2007) Motorhome from AZ to MN, WI, IA, NE, KS, NM and the navigation on this Alpine PMD-B100 is completely unacceptable.  We had to relie on road maps most of the time and thank goodness we had them with us.  As an example, just before we reached our home destination it had me turn into an airport which wasn't a road, but a driveway.  It told me to turn into a Pecan Grove where there wasn't even a road and then when I was on the main road leading to my home