Just finished this series, and it was kind of fantastic. I loved the second half - who wouldn't love a mecha merging with a spaceship to fight the moon? Or two giant mechas throwing entire galaxies at each other? It was completely ridiculous, and the Star Trek-level pseudoscience to make it seem logical while you had no idea what was going on was delicious.
Aside from the crazy robot fights though, there was a wonderful level of emotional drama here too: Kamina's death, Yoko losing every man who kisses her, Simon growing into his leadership role, that wedding scene. :( This seemingly shallow series had a surprising amount of poignant moments.
Personally there was not an episode i didn't like, and it earned a 10/10 from me.
Up next: Elfen Lied