The scenes with a half-insane Commissioner Gordon (don't ask) are genuinely unsettling, but none of the scenes with the Joker are, ironically. The way Dr. Hurt gets his tush handed to him is spectacularly campy, but isn't as cathartic as how he was defeated the first time. The Joker comes back, but isn't really funny enough to be fun to read, but not crazy enough to be scary. The last issue in the volume is a prelude to the Batman Inc. plot, so it's really just setup. Remember how I said I liked Frazer Irving in my last Batman review?
Well I still do, but only in small amounts. A large chunk of the first arc is drawn by him, so his art loses its appeal. Overall, a spooky, but fun rollercoaster ride.