I did this with my friend on our gal pal/college roomie trip in January. It has been a bucket list item for both of us, and we were glad we did it. Our tour guide was awesome and she had tons of fun facts and info. Lunch at Pecos Bill's was great, and we got to ride Haunted Mansion and Jungle Cruise. Going into the Utilidors was so fun, and we even saw the noon parade at MK gearing up behind the scenes...that was mind-blowing and so fun!
However, I wouldn't ever need to do it again. We thoroughly enjoyed it, but it's definitely a one and done for me. It's a lot of walking, and a lot of focusing on facts and information. My friend and I were surprised at how tired we were (mentally and physically) when the tour was over. We had planned to be at MK for the rest of the day (it takes 4-5 hours out of your day), but instead, we went back to our resort to rest.
I would definitely go for it, but be ready for a long, fun, tiring experience. I hope you have a magical trip!