Please remember that this is my own personal opinion, whether you find it distasteful or outright wrong in your viewpoint, is your own valued perspective.
Story: The story is original, although it has the overused theme of aliens coming to earth for reasons unknown other than destruction, a typical fanservice-harem anime was easily revealed when the main roles were given to sexy teenage girls with giant racks and fetishes for younger boys. They attempted, and accomplished well to have a good amount of action and shounen aspects which I found the most blatant factor of why this anime was good. The amounts of ecchi were tastefully included, not shoved in your face at every scene, which is a plus, and the overall plot kept you guessing. Near the end however like many other short anime, was rushed dramatically, dropping the amount of effect it has on the audience. My guess was that Freezing never intended to have a second season, but did particularly well,which is why i look forward to it airing in October of 2013.
Art and Sound: The animations for the Limiter's Freezing have to be my favorite, other than that the soundtrack complimented well with the scenes and the art was very good. Although giagantic oppai that are too large for reality do kind of disagree with me, they kept it fairly under control. Respect points for that. The action scenes were well done too,with enough gore to add effect, but not too much to make you lose your lunch, it was done thoughtfully.
Characters: The personality traits is mainly what i look for in characters, that said,some characteristics were standard in all harem anime, but who can deny the desires of the audience =P.
Overall i enjoyed this anime series and i recommend it to any that enjoyed similar ones such as, Pokemon (XD), Date a Live, Guilty Crown and possibly Angel Beats! fans.
SPOILER
The ending really got me hooked on expecting a second season.
