I have not upgraded the navigation system DVD that came with my 2005 RL. Two things have suprised/disappointed me. First, it often does not have streets in my city that have been around 10-12 years (I live in a town of 300K people--not a tiny place).....it seems very often to be telling me that I'm not on a verified road! Second, even when a road is on the map, the GPS seems to have me off by 100-200 feet, showing me off the road entirely. Anyone else have these issues, and will updating my disc likely solve some of this?