My best friend was reading it while we vacationed in Mazatlan. Every once in a while she would throw it down in disgust because it was so "over the top" in presenting an entirely fictional history. She couldn't put it down though because it was generally a good read. I wanted it next but her daughter got it before me. I'm still waiting.
I will read it with a large grain of salt. I am interested in anything that includes the Cathars. Of course, the Catholic church has been very successful at suppressing that part of history. Genocide is pretty ugly and doesn't fit the image of benevolent Christianity.