I make no claims that E7 some paragon of amazing anime. It was what it was. A perfectly adequate mech anime with a bit of a pie in the sky ending. It's music, however, is sublime. Hell how about:
Ok so it takes about a minute before it actually becomes a song. It wasn't an opener or a closer though. It was played during the anime itself. And like "don't lose your way" from Kill la Kill it was excellent at it's job.