Last night, I took a 5 hour drive to a friend's house and decided to try the navigation. I took this exact same trip last year and the droid 1 nav worked flawlessly, so I had high expectations for the droid 3.
I've never seen a more bug-riddled nav app before. It spent the entire trip "searching for gps" and rarely showed us as where we were. It quite often actually showed us on the wrong roada, or even moving the wrong way. It's a good thing I already knew the way, because this thing was useless. Even after making sure all of the gps systems were on.
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