I'm glad you liked it. On the whole, I also enjoyed the book. I only vaguely remember now (years after reading), but wasn't there some sort of undersea modified-human group-mind entity at the end? I more enjoyed the first 2/3 of the book, before the disjointed action-movie climax (a similar proportion holds for my enjoyment of Anathem).

Stephenson is still one of my favorite authors (although for some reason I've still only read the first of his Baroque series).