I was severely disappointed by this show. Mind you, I am paying a lot of attention to the creation of the world itself as well as plot and characters. I found myself rolling eyes a lot when watching the series - the tropes are a plenty here - and what makes it worse is the mediocre execution
What I liked:
* The "stick to what you decided" theme
* The older cousin character
* Art was good
What I disliked:
* Holes in the plot
* Incomplete world (examples: mecha get damaged, how do they become functional again? What really happened in the past between the main character and the mecha? Staff conveniently out of the way when they would be restraining main characters.)
* The Loli, even if she is older than she looks, or maybe that's what makes it worse
* "PEEERFECT" and "ROOOGER THAT!" - significant contributors to "eyeroll factor"