The acting quality is very good, the scary scenes are good also.
The story ending could have gone better, starting from the death of the inquisitor till the resurrection of the girl.
I am no Christian, but Mary is still a holy figure in my religious background, and I didn't find the story to be disrespecting Mary in any way, it actually addressed real life issues, such as the devil disguises as a holy angelic being to deceive people of faith, and such as when the religious community tries to cover facts from the public for the sake of not loosing their image or reputation, or when they ignore the later discovered facts that contradicts with their agenda for the sake of gaining more followers.