I opened it and used it a few times, but I stopped using it after a month, so I stored it in its original container. I'm putting it up for sale, hoping someone will use it. I can also offer it as a set with other items I have for sale. (Currently, I have a Jump Challenge Pad cover and a set of 8 Kodomo Challenge sample DVDs.) If you have any questions, feel free to comment. Of course, immediate purchase is also welcome.