Most of the special effects aren't that good - whenever they've got the chance, they cheat.
On the plus side, it's not an insult to the viewer's intelligence. The acting's OK.
Towards the end, Jo Anna became unsettled, so I took her outside. Fortunately, you could see and hear what was going on, because I was interested enough to find out what was going to happen, but no way was I going to sit through all of this again to do so.
Mind you, I've yet to read any of the books.