I have noticed that many of the VVV reviews have been largely negative but I feel that this show deserve more credit. The story is possibly the weakest point of the whole show-not to say that its bad. As a 12 episode show the writer don't have long to introduce the characters and the plot. There are two or three episodes which don't tie directly into the main plot and though the episodes are good, the episodes would have likely been better used in addressing the main story which feels like it needs one or two more episodes to finish properly. The character backgrounds are interesting butare not fully explored which is disappointing as it could have helped a lot with understanding the main plot. The show's ending left a lot to be desired for. It feels as if it is only part one of a series but there is no second season to VVV.
The art is beautifully done and though it is stating to look out of date it still is quite beautiful The character design is very sleek and the viewer doesn't get the sense of "exaggeration" from the characters. Mind you that that doesn't mean that the series isn't anime like-its an artistic take on anime which allowed me to pay attention more on the story than the characters appearances staring at disturbingly big chests or hair that looks more heavy than the character's head.
Characters were a mix of good and bad but mostly good. The humans in the show have very unique personalities from one another and play off each other well. The major problem are the viillians (viruses for the most part). They have a feeling for the most part of the standard evil character. It would have been nice to have had less predictable villians but they still did their evil jobs very well.
I finished this series in a couple of days. If you want a short 12 episode series to watch and you like action I think you will find this series enjoyable. Try not to think to deep into the show-just watch and see how it is played out.