Apple Maps has some good features, but mostly misses the mark with an offering that's not as good as the Google-powered offering in iOS 5.
3D Flyover is impressive, but faulty
When in a supported city, 3D Flyover views are very impressive, and you can browse smoothly with a high frame rate even on last-gen devices. If you get away from supported cities, there can be severe visual bugs.
When you select an icon from the map, or choose a search result, Apple's Maps app shows an info card with contact details, the address, and other info. You also can touch the tabs at the top for Yelp reviews and pictures from the venue, which can be useful.
When viewing your area, Apple's Maps app shows icons for restaurants, coffee shops, and other services, but you wont get public transportation details, and you won't get names of establishments without touching an icon. This is not an upgrade to the previous Google-powered Maps app in iOS 5.