I just finished it as well, one or two weeks behind schedule. Completely agreeing with that KitKat said, I was still fairly confused by everything, and the general direction (which was none) that the show was taking. Would prior knowledge have helped this? I don't think it would have been likely. Add the whales to the list of things they didn't explain. I still don't know what they are.

On a positive note, this series did have some decent animation, and though dealt with poorly, it did touch on some meaningful themes. In addition to Yuki's shopping scene, I thought Megumi and Morimoto's backstory episodes were two of the better done aspects of this show.

Overall, I'll say it's a so-so series. Confusing, and somewhat slow near the beginning, but definitely not Naruto-slow. It'd probably be more enjoyable to consider it a sequel/ supplement for the games rather than a standalone anime. I don't regret picking it up.