What are the advantages / disadvantages of Bing maps over Map Kit on iOS

Microsoft have recently released a Bing maps objective c component.

See here and here

They mention that have less restrictive terms:

We think you will find that the terms of use are less restrictive than what you find with the Apple Map Kit, with no sacrifice in functionality.

What exactly does that mean? Can we now save the map images in our app for offline use, for example?

• What other advantages are there?
• What are the disadvantages of using Bing maps over map kit?