Is the iPhone 4S good with iOS6?

My friends mom has the iPhone 4 and she says its been acting kinda weird. I just wanted to know because if it does suck, I want the iPhone 5, but if that sucks too, then I want the galaxy s3.

Galaxy s3 is best

This upgrade to 6 ruined completely my perfect iPhone 4:
1-The battery drains incomprehensibly, even with all apps closed!
2- very slow, both apps and normal processes.
3- did you try to use the phone while it is on charge? It's absolutely screwed up. You
have to unplug.
What a huge mistake I made!