I haven't seen all of the series yet, but from the dozen or so episodes I have seen so far I can say that I was pleasantly surprised by it. For a kids-block show, it has some surprisingly good story lines though it caves into the kiddy-theme now and then. Its far from the top tier quality of something like Kenshin, Cowboy Bebop, etc... but it's at least a step up from the likes of Pokemon or Digimon.
I especially was pleased with the relationship of Yakumo to the Enterrans...putting Humanity on the endangered species list and having the youthful sweetness of a young girl as the real last hope to save everyone. Enlisting Mushra/Mushrambo as her staunch ally is a nice touch since he was theretofore destined to kill her...and so now defeats his own kind in Humanity's defense.
I especially was pleased with the relationship of Yakumo to the Enterrans...putting Humanity on the endangered species list and having the youthful sweetness of a young girl as the real last hope to save everyone. Enlisting Mushra/Mushrambo as her staunch ally is a nice touch since he was theretofore destined to kill her...and so now defeats his own kind in Humanity's defense.