Nope. They're to expensive. The current model for S3 is around $65, and the new one that is to come out is to be $80+. I'd rather get Seidio's version that will be coming out.
There are some reviews for the case though. I despised the PowerSkin for SII and other older phones because the silicone was of bad quality. I'm not so sure about the one for the S3