Zazing, I like portability particularly with a gps unit. The best example I can give you is that I have a street pilot III, which resides under my second row seat until I need it. I will be heading out into the desert (maybe this weekend) and will definitely need the unit. On July 26 I am vacationing in Cape Cod so I will bring it along to get my family from the boston to the cape. From there we can get instant directions anywhere we want to go. Furthermore, I tend to get lost in my little boat so I will bring it while fishing and set my waypoints so I can get back. Garmin makes really good equipment and I have been completely satisfied with mine. I know On-star is not the same as the new nav systems they are putting in the H2 but I just have to say that I really hate on-star. It never worked for me and when I REALLY NEEDED DIRECTIONS they either sent me in the wrong direction or I lost the connection with the rep.
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