I remember going on a Disney animation 'tour' of some kind at MGM and I wasn't at all impressed - there was very little to it and they had us sitting on the floor at one point. We didn't mind sitting on the floor in itself, but it just made the experience feel like a school trip, rather than a slick Disney attraction that we'd come to expect!
One man's dream, however, was well done. To put it simply, it's a mini museum with really interesting memorabilia and a well produced film in a small cinema (which runs either every 15 minutes or half an hour). Might as well check it out - if you don't like then you can leave! There won't be a queue and it's a nice way to get out of the sun.