Since I have the car dock, and had to go to Philly this past weekend it was a perfect time to see how well this Navigation app worked. I gotta say it was flawless. I just spoke the address and it found all the spots with no problem. Of course, first stop was Tony Lukes (Philly Cheesesteaks).
Never pulled out a map or asked for directions. The only downside is the phone gets rather "hot" but its fully charged and ready to go when you get out of the car. Another is probably the apps not knowing whats under construction and detours and in Philly there are alot of detours. Still made it through without a hitch.