We did the PhotoMovie for our Christmas trip, and it was so worth it.
It was very easy to do. If you have digital pictures you have taken yourself, you just copy them to a file and upload them to the PhotoMovie site. You can also use any PhotoPass pictures that you like. They also have some Disney pictures that you can used (I used one of the castle with fireworks, since I'm not good at taking nighttime pictures.)
You get the movie with the scenes from the 4 parks (you don't have to include all of them unless you want to), plus you can add a section featuring the hotel you stayed at. There is also a slide show where you can see full-screen images of the photos that you included.
I would definitely recommend this - it is a precious keepsake.