if it's anything like what they have for blackberry they're great and essentially invisible. They have kind of a tacky feel which should make the iPhone less slippery--at least that's the way it feels on blackberry.
Got Three In the mail two days ago. Put them on mine and two friends phones. They work Look and Feel great. To answer your question it is a full body skin covering the whole phone chrome and all. If you haven't bought one yet, I think you should. It is the same thing that Invisible sheild sells for 30 bucks.