Glad everyone is enjoying the S4.
I'm having what appears to be a hardware problem (intermittent garbled audio, "pixel-ated" audio, and sometime a skreeching un-intelligible audio) so I called ATT.
They offered a refurbed S3 under warranty.
I inquired about perhaps an early upgrade.
They offered me $200 to get a re-furbed S4 with a new 2 year contract, or $450 for a new S4 with a 2 year contract. Needless to say, I opted for the refurbed S3.
Mike