Stay away from it!
Although it was fun at some parts, towards its end it becomes simply stupid, a really senselless plot without the grace of being even really funny, unless we consider ecchi bordering hentai funny.
Actually there is no plot, just an excuse to present yuri action and some small fighting scenes without even that much energy. The end itself was totally open and with a really stupid Great Revelation, and nothing is really resolved, and the reaction of the really really baka main protagonist was simply ... stupid.
Say, how much stupid it can get: The villain is using the main male character, does not like men and tried to make him kill his friends by controlling his actions, disregarding his will and seeing him as a tool, actually using his feelings towards her to her own wishes...and after the "hero" discovers it he does what? Says he loves her and ... that is that. Conclusion: he free his friends (wana-be lovers) and let the villain escape...
Sheesh....
The only thing really good are the voice actor/actressess who are really First Rate (hard to understand on such a bad production) and the art used which is undeniably beautiful.
A HUGE waste of Hard Drive space and time...
I tried Kämpfer because I read a review saying it was one of the good animes from last year...my my...
I can agree taste in this or that varies, but terribly made productions like this are BAD no matter your tastes.