Some "copypasta", wish I was less OCD and could tap out of a series..
The story is predicable, worse than the "Strike Witches", making it painful to watch.
Combat with the Alien Invaders quickly become repetitive, there is no real threat and when they could make things more interesting with standard military losses it's all whitewashed and ignored.
Animation is worse as well, irregularities in sizing, some spots that seem overly CGI'ed for shortcuts in the animation and generally bland.
Add in I'm not a fan of the Lolicon/Hebephilia genre, the young girls running around with frequent lower torso zooms is a serious detractor in my opinion.
Overall it's a soft pass, not the worst I've seen, but down in the bottom 20%.