I've taken a few lengthy road trips in the BRZ now and having used the OEM Fujitsu navi to do the route guidance I've discovered what I think is a bug or flaw in the way it functions. I know, shocking, the BRZ Navi sucks so much I bet not many people have bothered to use it enough to discover this issue.
So here's where it comes up. You set up a route destination and start on your trip. Along the way you decide to change the radio station or switch audio etc. So you hit the AUDIO button and make your adjustments. Then to get back to the Navigation you press the MAP button. It switches the display back to the map and then it speaks. The problem is, it then gives you improper audio directions because it will give you the next expected turn instruction waayyyy before it is due. Regardless of how far away the next turn on your route is, the navi will say that turn is coming up in half a mile.
So let's say you're driving along I-5 (a really long interstate here in CA) and your next turn or exit is not until 80 miles from where you are. But you go to change your radio station and then go back to the navi mode, and she will tell you right away that you need to exit for the next turn in half a mile.
Just stupid in how it functions. In my Lexus navi whenever you press the MAP button while you are in route guidance mode, it verbally tells you how far away the next turn is and what the next turn/direction would be. So if you are 80 miles away from the next turn it would say "in 80 miles, take the exit on the right". In the Subaru, same steps gets you "in half a mile, take the exit on the right." It simply says whatever the next guidance prompt should be, way early. You can imagine how confusing or crazy this could get if you are not paying attention to where you are or totally not familiar with the route, the navi will have you exiting early in the middle of nowhere.