I'm not familiar with the manga, but I wasn't overly impressed honestly. The background art was great, but I found the character art pretty ugly, especially the way that Claire's armor made her look so highly sexualized. The fights were decent, but not really wowing, and I'm not really certain how much of that was the show actually having a budget, or the fact that 90% of the episode was talking heads.
So... at least to me... it was a pretty meh beginning.