Google has released its new iOS map SDK for public.

Few quick test and it shows this:

– SDKDemos sometimes freezes when using Satellite/Hybrid  map

– no direct support for tile overlays, see also this:

-nice 3D building appear in certain cities

-supports rotation and tilting

-they have created their own API making transition form MapKit not smooth (unlike MapQuest iOS map API that is drop-in replacement for MapKit )

in summary : nice, smooth maps, that sometime freezes whole app. Tested on iPad3