Granted, much of me was like, "Hehehe, kitty", but the story was good. Nothing unpredictable, really - it was kinda like eating a tasty, fluffy desert.
The 3D system was interesting - we got glasses and it gave a bit of depth to things. Wasn't amazing or stunning, and not worth paying extra for (I didn't pay for this at all - got a random free Fandango movie code).
The only thing that I think was slightly lacking was the shock Bolt experienced upon realizing that he had no real powers... It was really brief, but he accepted it amazingly well.
Also, "Penny"? Anyone else thought of Inspector Gadget? She had a dog too...