My girls have the pink one and love it! My puppymill rescue is fearful of some of the Nina Ottoson interactive toys, so I was really happy to see she wasn't afraid of this one.
I videoed them playing with it the other day and just uploaded it:
I had to put Rory in a sit/stay before I started the video, because she figures out all the interactive toys in about 5 seconds and then likes to show off how quickly she can get all the treats out.