I'm only four or five hours in, and it's ok so far. I love how everyone calls this a "Mature" Zelda, because although it's gory, it's also really fucking dopey. Zelda for manchildren.
For what it is, it's entertaining. If you really needed another find keys/acquire objects/air combo/weapon upgrade/glide jump platformer, then I guess this one of those games. I'm not sure how much I needed it, personally, but there are definitely some fun moments.
I actually liked the intro. It had some neat little flourishes, like the news scroll that reads "DEMON COMETS STRIKE MANHATTAN!", that make subsequent levels feel like a dreary slog. I'm in the lava cathedral, and I'm loathing the derivative pushbutton puzzles. I'm really hoping this is the game's nadir.