The guy at Circuit City sold me the CN 2008 Update. He told me that my Garmin came with the basic map already installed and that it would just update it. ...apparently that did not work out so well. I returned it went next door to Dicks and picked up Topo. I am interested to hear if anyone thinks that paying teh extra money for CN is really worth it. I would like to be able to use it for in my car as well but Topo seems to have all the streets. I do not understand what the advantage will be.