It's a shame that the whole thing wasn't kept in this tone - no fanservice, but well-handled, non-obvious puzzles. The best (or worst) thing is that I just realized how much this series has a problem with exposition - the characters just monologue for 5-10 minutes, explaining everything to the viewer, but the non-chronological narrative and the rather convoluted way of telling the story, straight from NGE or Serial Experiment Lain, make it take a lot of attention to figure out what's going on.
