To me, it depends on your reasons for watching. You need a VERY open mind. If you are religious, perhaps steer clear as it might be offensive. In saying this, it is based loosely on a historical truth; the life of the main character and religious beliefs and at the time. Truth be told, religion held too much power then and I don't see how anyone cannot see the irony here considering the corruption based on beliefs.
Personally, the story between the two women lacked the romance I was searching for. But then again, that's was never the theme so I can't complain. Would I watch it again? Probably not. Give me a bit of romance then I'll totally be on board. Call me crazy for saying so but there is something irresistibly fascinating about that lifestyle. Dare I say, the imagination boggles to think what might even occur between a select group of nuns behind closed doors ;)
Lastly, the erotic scenes with Jesus. Well, ironically she is "married" to God so who should say what that means for her, strange as it may seem. But the entire theme was about this woman being a bit off her rocker so not really shocking. The point is not to take it too seriously. There are plenty of other movies out there if that's your thing.