I've been on IOS 6 since a few days after the beta came out and I can tell you that the new Maps is nearly worthless, especially if you've entered a decent amount of data into Google Maps. Yes the navigation sucks, yes there's other huge basic issues, but the killer for me is that I have over 270 starred places in Google Maps and without being able to get to that data, Apple's new option is nearly useless.

I don't want to gloss over how much the basics suck on this app, they suck profoundly. The bookmarks is the worst loss though. I have an iPhone for work but I'm very glad I no longer am under a personal iPhone contract because with the lack of features in IOS 6, I don't see how I'd ever go back to using an Apple phone full time.