Don't get me wrong there are advantages to using the app on the droid for maps from Google. You get live traffic, street view, 3D, satellite view, landmarks etc... and yes being the droid you get gps from satellite. But don't everyone forget you must first purchase the phone and the fact that you have to buy a monthly data plan that will add up to way more then a nice hand-held GPS in a short amount of time, unless you already have this phone then its an existing expense you are used to.
Also, downloading the maps from Google doesn't mean you are getting the most up to date maps, you are just getting whatever they have at present time. See Google does have accurate data that it gathers from the local gov. level but because of their update rate sometimes it takes a very long time to get local updates.
I know I am biased towards GPS devises because of my job but you can do a lot more with accuracy, data gathering etc... that I find really useful.
JW
