Of the three books so far I must say the this was by far my favorite. While I had to almost force myself to read the others at no time during my reading of RBoE did I feel bored. I actually liked the Sisko plot. I was a little confused with what happened to Vaughn in ZSG and I am glad that was explained although I don't think I am alone when I say that This book should have been first.
I am a little disappointed with these books as a whole. They are missing something and don't seem to flow as well as Destiny. We are seeing parts of the Thypon Pact as individuals and dealing with inside issues and not as one big group. I am hoping that the novels coming out after Paths of Disharmony or maybe that book itself finally shows us what the Typhon Pact is all about.