I took the tour at the beginning of December. You learn about holiday traditions from around the world, we got a piece of free fudge, got to go to the front of the line on Haunted Mansion Holiday and Small World Holiday, and then we had special seating for the Christmas parade. While you are sitting, you get to eat a cookie and drink some hot chocolate. We also received a pin after the tour was over. I enjoyed it, but I know not everyone did, it depends on what you are expecting from it. I think some people expected way too much. Not every tour guide is the same, some are more outgoing, and some are more sedate.
I enjoyed listening to the music on our headsets as we walked around the park, not everyone did. Like I said, it depends on what you are expecting, and what kind of things you enjoy, plus what type of guide you have.