I think a day in the Disney parks is a great value. This past week, I had some real-world experiences that made me appreciate what a good deal Disney really is.
So, my sister in law and my nieces were in town for three days for a family matter involving my brother and I played hostess, taking them around and doing a few fun things. I couldn't believe how much we spent not doing all that much:
(1) We all went to a Halloween/corn maze/pumpkin patch "fall fun" place. Admission was $12 per person, but there were rides that cost more ($30 or $40 to ride a zip line or do this big plastic ball thing where you slid down a hill). Renting a fire pit was like $15 and they had food and drinks, but they were pretty pricey ($4 for apple cider and $3 hot chocolate). I paid for myself, my sons, and my SIL and nieces. I spent $150 easily and we were there for about two and a half hours. I don't think it was a good value at all and we ran out of things to do quickly. I could have easily spent $300 there if my sons were older and had wanted to do all the zip lines and stuff. There's no way that we would want to ever spend more than three hours at that place. We had a nice time, but once every three years is good for this place.
(2) I took everyone to dinner and a movie one night. I spent something like $250, for the six of us, with dinner, the movie, and snacks at the movie. I have buyers' remorse over the whole thing since I don't think it was a good value. And the movie stunk.
I've never once walked out of a Disney parking thinking "that was boring" or "it wasn't worth it". And I usually get there at rope drop and stay until closing. I think it's a bargain at any price because there is just so much to do.