The ONLY negative I can find on the S3 is, for whatever reason, Samsung decided we need to have our WiFi on 24/7. Yes, you can turn it off, but as soon as it sees a connection, it comes right back on!!!
Has anyone come across a third party app that will override this feature? They have all these battery saving configurations and yet, configure a phone that forces one of the biggest resource hogs to be on all the time!!!