i'm enjoying the maps app
spent about and hour playing w. ios6 maps yesterday. loved it. i live in nyc, and i used the 3d view to pan around manhattan and the outer boroughs. didn't see some of the other issues that i've read about. brooklyn bridge looked fine. a search for nyc apple stores displayed the 5 stores no problem. loved the vectoring and changing the viewing angle. directions seemed to properly route me from origin to destination.
although i didn't experience them, there's ample evidence from others that there are kinks ... but pretty "amazing" first try out of the gate ....
i'll use the google web app if i want street view. have other apps for public transit. bottom line for me .... transition no big deal.