okee,
I've seen the demo from disney first and I'm quite impressed by the whole set. Yet, because it's too expensive and some of my friends said that the most important thing is, to cultivate a learning environment for baby. Therefore, I decided not to buy it, instead, conducting more research to help cultivate the environment. Personally, I like Disney's card machine and therefore, when i know that there's another company selling the card machine with a much lower price, I decided to look into it.
I also agreed with helencyl , another area that I like pop-up, is that it can read Putonghua and later on, Japanese cards. Though it's not as comprehensive than Disney, I think the cost is justified. Agreed that it's a tool, and it's more important that parent are dedicated to love and educate their babies.