I think this one is Wan's best (I'd have to re-watch the original SAW to be sure, but I'm pretty sure). Far better than Insidious. Vera Farmiga is highly underrated and is the best part of this movie. There was also some great cinematography going on. However I have to agree with the comments about the third act. A little too much shit going on. But not enough to ruin it.
By the way, here is the original Anabelle doll