I finished the novel tonight and have to say I really enjoyed it. To be fair, I'm not a huge TNG fan, so the return of various TNG characters (recurring and one-shot) perhaps wasn't as exciting for me as it probably was for others. I did like the revelation that Nog has now switched to security; it reminded me of "The Magnificent Ferengi" where he led the mission to rescue his grandmother.
I do have one question for the author. In the novel, Nog transports the crew of one of Bok's starships through their shields, noting it was one of Odo's favorite tricks. I don't recall Odo ever doing something like this, although I could be wrong.