I have had problems with Sprint Navigation on my Palm Pre. Last night was the first time I have used it in a long time. But, I have noticed the following issues:
1. The audio cuts on and off. For example, the voice will say: "Turn right, on _____ street". This doesn't happen all the time, but, when it does, it is annoying.
2. Not being able to acquire a GPS fix. The suggested way to get around this is to reset the phone. That does work, however, the problem eventually came back. Also, having to reset the phone considering how long it takes for the Pre get past the "Palm" screen is a huge hassle.
3. While using the Sprint Navigation, sometimes in the middle of driving it will say: "Low GPS signal"
For more information check out these links:
Choppy Audio on Sprint Navigation Palm Pre Palm Pre Sprint Navigation Problems Sprint Navigation unable to find GPS