They have been there every time I have. I really like them. They are shows, tho, so you need to fit them in your schedule. Also, it gets cold in posiedon so dont go in there after a wet ride.
They were up and running when we were there 12/26-1/1. Great shows, especially PF. Like one poster said, it gets a bit chilly in the attraction. Too, really young children could get affraid. Have fun!
As of right now the only thing that is down is Dudley Do right, and that will be opening up fairly soon. BTTF only has one side operating causing long lines, but thats over at the studios.