Excellent premise, with some fun consequences. There are some interesting interactions due to the fact that the sexes have been separated so long. The awkward jokes added to the enjoyment factor for me but may not be to everyone's taste. The shift in focus towards a common enemy is a little cheesy though.
Nice to watch, fits well. The CG and the animated sections fit ok with each other and some sequences are excellent. There is good attention to detail and some nice Mecha designs, if thats what your into.
The music is what you would expect, it doesn't do too much to announce or impose itself, which is to its credit. The voices are only average, and with similar things being repeated often they do get a little tiresome.
Likeable characters, who progress well, considering how short the season is. Most short seasons dispense with devlopment as it will only slow the action down, but some effort has been made to make the characters more relatable.
Fun. This is probably a fair description. It is not groundbreaking, or close, in any of the major points but that will not stop you from wanting to watch the next season.