Haven't finished it yet, but I can say it doesn't move me as other DRGIII novels. It certainly isn't bad or anything, but the story itself and the characters just don't do it for me that much.
That said (and as I stated in this topic already) the 5YM is not my favorite period, and the TOS characters don't really do it for me all that much in general. However, David's writing is solid and consistent, and on par with his other work sofar. That is what is keeping me into this novel really. I'll probably finish it tonight or tomorrow, and post my final findings then.