MC is a good game, but definitely not the best.
The good:
- Story. MC has one of the best story in Zelda games imo.*spoilers* I loved when Zelda turned into stone, or how Ezlo turned out to be Vaati's master =D *end spoilers*. And the ending was great.
- Items: All the items were really fun to play with and had unique uses (personally I love the magical boomerang).
The bad:
- The kinstones fusions. They were irritating, you had to go all over the places to get kinstones (I hated cutting the grass to get them), and some fusions couldn't be done when you missed them. One fusion led to another fusion, and that one led to some strange places that you probably didn't remember where they are. And it made me feel like I was doing a chore rather than playing a game. -_-
- Difficulty: The game was too easy and lacks of challenges (I beat it in 2 days or so). I saw very little puzzles, and the enemies were pieces of cake.
So, in my opinion, MC isn't a bad game, but it's not very good either (for a Zelda game). It's just decent. I still prefer LA, OoX and Alttp (GBA version) over it. They're much better than MC.