I have been a long time user of the original iSkin Revo for the first iPhone for about 2 years, and that case has been thru so much and kept my iPhone safe and sound for such a long time. It's amazing how after that much time, the Revo held up so well it could have served me for many more years. And now we have the new iSkin Revo4 case for the iPhone 4. This case is one of my favorite cases of all time for the iPhone, and the iPhone 4 version is just as good as past generations. The Revo4 is a very tough silicone case that offers complete protection for your iPhone 4.