Can't really compare mapquest though to Google Nav, not even remotely close to it or it's integration, I mean would you want your cars built in Nav system to use mapquest and it's crummy layout and limited use or the normal 3D views/options/integration/voice directions of car head units now and basically what Google Nav is?
And it does work w/o cell service, the maps are cached and GPS will still lock. I've been on trips where like through Carolinas where AT&T has basically 0 service in areas, especially through the mountains and places like Boone. And Google Nav worked fine still.
I think the OP though was trying to raise drama. I paid for Navigon and Telenav on the iPhones and didn't switch just b/c of Google Nav, which I love, bunch of other reasons why. I'd hope someone wouldn't switch a phone just b/c of a Nav app lol.[/QUOTE
Ah I assumed (wrongly) that the google maps had to connect up to google's servers to get the maps. ANd I only tried mapquest's maps a few times (I think it's gotten better according to people but when I tried it it lost where we were,on a highway, and then kept insisting oin trying to get us back on the highway which we already were on. ANd eventually gave up cause it couldn't believe we already were on the highway, it kept insisting we were on random side roads near the highway).
I like Navigon, it's worth the money

.
But yeah, in general I wouldn't give up a phone over one app (Or it would have to be some super uber app that there was no equivelant of and I'm still not sure I'd change phones for that). Now if it got most of the apps I want, that's different.