The cases were rather straight forward and rather simple. They didn't take a lot of twists and turns like a normal CSI NY episode would take, but it was still enjoyable reading. It's been a while since I watched an episode of the show, so my judgement may be off, but at times it seemed like the characterisation was not quite right.
It tied in very well with the show, referencing pivotal events for characters, in a way that wasn't just the author trying to show how much he knew about the show, but rather as a way of exploring the characters within the limits of the show. I particularly liked how parts of the ending were setting up for an episode of the show that it was timed to be directly before, but in a subtle way where it didn't matter if you hadn't seen the referencing or not.