To those of you who watched the first episode and thought "Oh, well this is just a typical magic girl cutesy type of thing." You are all too wrong. The storyline for this is amazing, it gets dark fast and I'm not allowed to explain how. You just have to give it a chance. Like everyone here says, watch until episode 3, you'll be begging for more. I know I was.
So yes, overall 5/5, there' a few