Lured me in with it being a story by Yasuo Ohtagaki (Gundam Thunderbolt), but one thing I can't stand in a series is inconsistency in the "rules" for sci-fi concepts. The Tardigrade creatures are shown to be impervious one minute and easily dispatched the next. They consume things at excessively rapid pace and then turn into slow lethargic creatures the next. Just whatever fits the moment, and it just cheapens the whole setup.