First off, the animation is great. The story is well not as great. Crazy explanation of what love is perhaps? I understood that they were trapped in some alternate reality. However the reasoning for that was not explained. Where the "spirit" wolves came from wasn't clearly explained as to why they do as they do. There was no explanation why the girl was able to do the thing she did. Also skipping the conclusion of them reuniting like really ruined the whole movie for me. After all that happened, I wish I got to see the reunion.
All in all, it's a long watch and has a somewhat unsatisfying ending, for me anyway.
Maybe I missed something or didn't grasp the idea to truly appreciate it but honestly I'd rather not do a rewatch to find it.