I have used this navi for 2 weeks.This navi is excellent finding satelite so quick, navigation is accurate and easy to operate. As for navigation, it earns 5 stars.What I don't like with this navi is that it does not charge the internal battery as long as I'm using it. In other words, I have to drive with this navi powered-off in order to charge the battery. Otherwise, I have to take it to my home and charge it with AC adapter, but AC adapter is not included. hmmm.