I have mixed feelings about this show. I loved the whole back-story of the undead, and I really liked the whole science vs religion thing they did near the end of the show. (The Trials were BADASS!)
My big problem was the characters, and the fact that they should have called the show "Kamen Rider Chalice"
Kenzaki got so little focus through the first half of the show, that you almost forgot that he was the main hero.
Garren seemed to be suffering from the Kabuto syndrome. He HAD to fight the other Riders, no matter how lame the reason was, and it made Tachibana look like a complete idiot who was willing to throw himself in front of a train if someone with a higher position told him to.
However, I want to give the writers credit for his "final battle". The speech he gave while beating the hell out of the Giraffa Undead almost gave me goosebumps.
Though, I also find it kinda funny, because it feels like the actor was giving a rant about how they had fucked up his character through the entire show
The show was all about Hajime, and he was the character I liked most. I love mystery characters. He almost felt like a new Gills to me.