On the positive side, this book was easy to read and had good flow. I devoured it in 2 days, 1/2 of the book each day. The idea of an ultra luxe miniature cruise ship was an interesting one and fun to visualize as I read.
On the negative side, the heroine is rather awful, reacting hysterically to every event that occurs. When she isn't hysterical, she's drunk, vomiting, or hungover. I think the picture of a girl prone to severe panic attacks who had suffered a recent trauma could have been sufficiently articulated to the reader without beating us over the head with it. I had also intuited the resolution about halfway through the book. I never bought the individual she suspects as the bad guy, so was not diverted down that byway.
This would have made a fun summer beach read, as it didn't require deep concentration from the reader and could easily have been picked up and put down numerous times without losing the train of the story.