[skyhook_mockups]

Every project/team is different. Sometimes a designer wants to communicate with another designer, sometimes with a developer and sometimes with a client. Each of these stakeholders will react differently to:

'...this screen looks like.. well you know a stock tableview'

And sometimes these people aren't in the same room/building/country

Simply dismissing the tool because you cant think of a use-case is a bit short sighted.

PS: also when designing for the iphone, elements have a surprisingly different feel when shown on a device.