It wasn't bad, I wasn't quite sure if it's shojo or shonen based on the side characters. The main detraction is I tend to find the arrogant noble "commoners need to know there place" character-types to just be annoying beyond any resolution even if they end up getting schooled for it. That aspect pulled the rating down for me as it was too frequent for me.
Nothing spectacular. I don't mind her being OP. She's pretty fun.
I take issue with the whole school setting - how'd the countries manage to not destroy themselves by this point is truly a mystery. There isn't even a spectre of realism in how school operates. Nah, not just the school. The world.