Main plot line: sub par. I just didn't care about the Kiliks, and I was quite frankly confused by this whole nest identity business. I also didn't think the usual politicking that takes place in these novels was especially intriguing or intense. Han and Leia's characters in particular are undergoing a transformation that seems logical, but Luke's is not.
I think the one bright spot in this series is Jacen Solo. Quite frankly, I was tempted to skip around the book to find chapters dealing with him and his new....situation...and avoiding the rest. I think the author's intention is to set up a similar situation for Jacen that Anakin Skywalker faced in the prequel series. While I find the new perspective Jacen takes on the force and his character itself interesting, I find the parallels being drawn between him and his grandfather a little too convenient and reeking of fan-service.