I'll take integrated nav over cell phone or Garmin/Magellan any day. Not only do you get a bigger screen, but you also don't have to worry about your battery dying on you. Cell phone nav apps use a buttload of battery life. If you're on a road trip and don't have a car charger, you'll have a dead phone in about an hour or so. Same with the Garmins, et. al. I was reading up on a Garmin and it said the battery expectancy was about 2 hours. No thank you. I'm not one for having wires and such running all over my interior or those suction cups stuck to my windshield or those flimsy brackets mounted in some awkward location.
Nope. Gimme good ol' factory integration! Not to mention it's WAY more than just a nav system!