1) Yes. It's a very good game. Albeit very short.
2) Very replayable. New difficulty after every playthrough, plus you need NG++ To unlock all upgrades.
3) Bayonetta is one of my favourite games ever, too. It's not as good, I have no qualms saying that. But the cutting mechanic and the general feel of the game is on par. Top quality slashing that never gets old or repetetive. Plus the QTE's are actually stylish as hell.
Nothing as badass as the "Don't fuck with a witch" scene. Though.
Sam does come close.
I also find it disgusting you've never played an MGS game. Like...Really?...Not even based MGS3? One of the greatest games in history?