I bought an iPhone 4 today and didn't want to leave the iPhone completely naked on its way home. I wanted something with a belt holster and the AT&T store representative pulled one of these AGF cases off the shelf. It's a case that slides the iPhone and a separate clip. I liked the belt clip holsters because it never really directly exposed the screen to anything. Has anyone heard good stories about these things? Will this thing rub or wear on the screen or antenna? Is it any good and should I get an invisibleshield to protect against wear? Best free case? Thanks!