Since this is my thread, I should prooobably put my opinion here.
Firstly, the music is completely awesome. It's kind of required considering it's a rhythm game, but they still did a really good job with it. I like how it takes all the classic zelda songs and just enhances them. The beats are also really easy to pick up on quickly.
Battle wise, I think the fighting style is clever. It feels tricky at first, but as you go through you start to figure out enemies patterns and you get better at predicting their moves. I greatly appreciate that you automatically attack and don't have to swing your sword to the beat.
Can't say much story wise where I'm at right now. There are some other things I like though. I think the death shop is clever, it's a good way not to discourage players in a difficult title. It helps when you get stuck in the spot you died by offering better weapons, and it's good encouragement to actually clear screens and earn diamonds. Sprites are cute. Items are cool. Life is good.
Overall, I quite like this game. Some complaints I have have to do with certain items not being keepable. Having to track down the hover boots whenever you need them can be tedious. Losing your rupees when you die kinda sucks, especially since most shops don't offer much good stuff. Sometimes I get distracted by the awesome music and just stand there instead of actually doing stuff. Otherwise though it's an enjoyable spinoff.