I love photo pass...you should definately use it. It's free, so you have nothing to loose!
Our last trip, however, I had a few complaints about some of our photographs. (It's free, so I really can't complain...) But, in front of Cinderella Castle, we had a group shot, and they didn't have the camera settings correct, as we ended up as an over-exposed group in front of a black background. The castle didn't come out at all. Then there's another pic in MGM, where the light meter must have been malfunctioning, as we turned out white, with horrible shadows behind us, and a cut of hat in the back. There were a few other problems with other pics, but not worth mentioning. I think they need to train the photographers better, as I was dissapointed in a lot of our pictures.