I found it to be worth it, particularly since without it I would only have about two pictures of me from our week-long vacation. We received multiple ride pictures (the ones from JP River Adventure are hilarious since my daughter and I have exactly the same expression on our faces), pictures with ET, Shrek, Spiderman, and Dr. Suess characters. However, there are no photographers wandering around (we also didn't find any at the "scenic" spots), just at the park entrances. My favorite picture from our vacation is one that was taken at the entrance to IOA.
I haven't tried printing any so I can't attest to the print quality, but they look just fine on my computer.