We have bought a photopass on 3 different trips. I totally recommend it.
Sometimes they run specials in the parks too, if you don't need/want any of the borders, they will give you the CD there and you can get some "free" prints of a few of the pictures.
Our fall/winter trips worked out perfectly. We did the Halloween Party and then went back just before Thanksgiving and got to see all the Christmas decorations. We got all the pictures and borders on the same CD.
I didn't pay much attention, but we bought the pics at Goofy's Kitchen and they said something about also getting to have them added to our photopass if we wanted I think. Since we didn't use it this past trip, I was only 1/2 listening....