This could be known as a "Madoka Magica" ripoff. It's all about the dark magical girl genre. Even if that is quite true, I think that Yuuki Yuuna surpasses Madoka Magica in many ways.
Story: The story isn't much to brag about. A bunch of girls need to protect the world from the "Vectors" and they fight them. Blah Blah. After the first couple of episodes, it starts to get pretty good. The foreshadowing was very subtle, unlike Madoka. I like to think that if foreshadowing is subtle then that makes the plot twist more dramatic.
Art/Animation: Not as good as Madoka. But you should be able to get used to it. It's pretty fluid and very colorful. The 3D animation is very noticeable but isn't as bad as others.
Sound: The soundtrack seemed Madoka-Esque. With Latin or some other language in it. The Opening was catchy with some subtle changes in it and the ending was forgetful. I enjoyed the Voice Acting. The screams were very realistic. The girl's screams weren't perfect and beautiful. The screams were cracked, high pitched and realistic.
Character: The character's had their very own reactions to the crisis they were in. Some of them broke down, some couldn't believe it and some tried to make it positive. They all had their episodes and they had their defining personalities. The character design was pretty weak though. Just looked like some fancy Madoka characters.
Enjoyment: To me, this series was a lot more tragic and darker than Madoka. That the girls couldn't die with their unmoving bodies. That they would forget all their memories. I felt that the friendship theme in Yuuki Yuuna was a lot more stronger than the other mahou shoujo shows. How the girls dealt with their broken friendship and how they tried to mend and fix it.
Overall: I would certainly pick this over Madoka. How subtle it was and how the girl's friendships were portrayed. It has a pretty slow and boring start but it's all worth it in the end. One of the many madoka alternatives.
