I travel frequently, and I sometimes involuntarily take the "scenic route" to get where I need to go. Does anybody have any experiance with Microsofts Streets & Trips w/GPS locator, its apparently mapping software with a GPS unit that plugs into your laptop via USB to show you where your at and etc. Here's a link to Microsofts page about it. www.microsoft.com/streets/ How well does the GPS unit pick up when I'm cruising 75 down the highway (passenger will be operating laptop obviously), or what about when I'm in the urban jungle of downtown, or in the hills of Tennesee? Reviews? Comments? Etc?