We bought one of the giant Mickey Heads in MK, but it's not like the one I saw at Goofy's. I assume the one you are talking about is the one that is decorated kind of like a cake. I have not had that one, but the giant mickey head we got at MK was not good. We were expecting it to taste like the small ones on a stick, but it didn't. It was hard instead of kind of chewy like the small ones, and it had kind of an odd plastic taste.
There seems to be two kinds of Rice Krispy treats. The ones that are shaped like a MIckey head and on a stick wrapped with Saran wrap type material witha twist tie one the bottom are great. Then there are others that come in various shapes and sizes and they are in a more industrial sealed bag, these are not as good. That's JMHO of course.