Kekkai Sensen is a fun and entertaining anime. This anime has a bizarre world with strange characters, especially the ones in Libra. However, most of them are great, specially Klaus and Zapp. The story can be a bit confusing, but it might be a problem of mine. It's a well done plot added with great action sequences and a creative soundtrack. I really recommend this anime to anyone who likes action anime in general, and of course, you should listen to the OP, ED and the soundtrack. Ps.: that ED is simply one of the greatest I have ever seen in this decade.