The idea of Elisa being chosen by God, and marked as His with a Godstone jewel, was interesting. But having that jewel sticking out of her navel was just weird. And late in the book there's a really strange scene with the Godstone that just makes the story lose a lot of credibility. A true wtf moment.
I'm interested to see where the story goes, so I'll probably come back to this series when I have the chance. Not a must-read situation, but a good enough tale that I'm ready to give it some more attention.