I'm using the one that came in it from the factory.
I know it's not portable and you can't use it in other cars, but my other cars have their own NAV too, so that's not an issue. And yes, others say it's crap, but it's about the easiest one to use that I've seen and it works for me.
I've heard good things about the Tom Tom and the Garmins. Magellan is junk from what's been posted, for the most part.
I've heard good things about the Tom Tom and the Garmins. Magellan is junk from what's been posted, for the most part.