I have Nokia Drive on my Lumia 900, and its good enough that I no longer use a stand alone GPS. It was on the phone when I bought it from the AT&T store.
It has it, but is it better than Bing Maps? Bing's integration is great. Can tap an address on just about any contact page and pull it up in Maps. Would hate to have to open a separate app.
Nokia Drive is a zillion times better than Bing Maps. The only downside is that it's not baked into the OS like Bing Maps, thus you have to manually enter in the addresses.