We took in the Mary Blair exhibit, and it was well worth the price of admission.
The main exhibit was huuuuge! There is a bit of a backlog at the beginning, as everyone tries to read every single bit of information. As people make their way through, they tend to skip over more stuff, a spread out more. Honestly, if I had known that the Disneyland exhibit was at the end, I would have started there! By the time we made our way through all the other areas, I was exhausted.
Very enjoyable though, and very informative.
I would NOT recommend it for children though.