Well, I haven't re-read this book in ages, and it's not really one that I care to pick up for light reading. I have a few qualms about it, and tend to agree with Rskkiya and Real Anastasia's opinions.
Certainly, it doesn't seem like the authors really understand Orthodoxy or Sainthood within the Orthodox Church from what I recall of the passages pertaining to that. That for me was the biggest disappointment with the book. I am not saying that everyone must agree with the Orthodox Church's point of view about the Romanovs, but ISTM that the authors just don't get it, and also don't think it's worth getting.
Now as for the rest, it is good in that it has in one volume all the bits and pieces scattered through a plethora of other books. The execution, while gory, I think, should be more widely read, albeit, a bit editted perhaps, but it shows quite clearly how the stuff like it was all over in seconds, Alix and Olga cross themselves, everyone instantly dead except Alexei and Anastasia, who are then very quickly and neatly killed, is a ridiculous myth. That may be the more redeeming part of the book.
As for the foibles and character flaws of the Romanov family - well, everyone has them, we are none of us perfect. They were not sanctified for being wonderful people, but for the way that they met their fate. The fact that they screamed or tried running about the room to escape the bullets in their last minutes of terror does not in any way detract from their Passion-bearing status - even Christ on the cross called out asking why God had forsaken Him, and spent hours before in agony (of soul) in Gethsemane.
What I do not like about the portrayal of their character flaws is that it is unbalanced - it is like they want to show so much the worst sides of their characters that their positive aspects get altogether glossed over.