If I read the info correctly you have the option of renting Pal Mickey for a day or for several days, or buying Pal Mickey outright. Thinking back to when my daughter was young I can just imagine telling her we were only going to have Pal Mickey with us for a couple days, she says that's fine with her, then trying to wrest Pal Mickey out of her arms at the end of our Disney vacation. What a way to end a vacation, your child in tears as Pal Mickey returns to the store. Wonder how the rental rate compares to the purchase rate.
Oddly enough the only one I saw was in Epcot and being carried by a 40ish year old man. Near the area between Future World and World Showcase heard Mickey say something about looking for a shortcut between FW and World Showcase.
Phrank