yeah, we have one. Its cute but the locking mechanism is annoying and we rarely use it to actually wheel the kid around. When traveling you are usually too busy pulling your own bags around to add this. one of my other kids has something more like this:
http://www.amazon.com/Stephen-Joseph-Rolling-Luggage-Sports/dp/B002L0IQ5I and we like it more. It rolls very easily and the kids like being in charge of rolling their luggage.