There are 45 episodes encompassing four stories, two useless 1 episode recaps, and two 1 episode "I dunno's". The two longest stories, the interesting first and the third, center on the same character, the last story is the weakest and the terrific second story that was never finished; it just stopped in the middle. There is also a fifth story hinted at but never developed.
I wish that the series went longer but can see why it was canceled given the nature of the weak last story and the unfinished second. I would say the best parts were the opening theme and internal soundtrack (the closing theme was kinda Japanese country/western pop) and the bestiary of creatures that live in Juuni Kokuki particularly those that can change from an animal to human form at will. The worst was the second story which was interesting and strong enough to rate a 26 episode series on its on in my opinion.