Let's start by saying that despite being a "monster of the day" type of anime, IT'S NOT BAD!
Each episode features a different "mystery" with little continuation of the rest of the show, but they are very well done and provide a lot of insight towards Japanese folklore and culture.
That being, I give this anime an 8/10. High points were great music, original concept, good story telling and humor. However, character development seemed a bit shallow and the monster of the day format sometimes makes the show seem pointless.
Final thought: With the way the show ended, it seems that there could be a sequel. I look forward to it!