Timothy ran into these NSD people at CES. If we were giving out a "best huckster" award, NSD booth dude Doug Lo would surely be a finalist for it. He's one heck of a talker. The exercise balls he's pushing? A number of companies have been making and selling similar products for many years. They seem to have some medical benefit as physical therapy aids for people with wrist or carpal tunnel problems, and may also be useful exercise devices for people who want to strengthen their hands and fingers. Have you used a gyroscope exercise ball? If so, did it help cure a wrist problem or help strengthen your hands and fingers? And which of these brands (if any) did you try?