I finished this book this morning and liked it. i gave it an Above Average but that is only because it is book one out of three. Like two-parters on tv I find it hard to review them until I've seen the entire piece of work.
I did enjoy the book and if the other two stay at this level or even improve it will be a great trilogy.
The one part of the book that had the strongest impact on me was the 'dark' Picard. He was so different from the Picard of the tv show, that it was he alone who for me summed up the threat the Federation faced.