It is called the Nike Air Plus, and I have tested it at the store when I worked there as well as have a few friends who use it religiously. The first person who ever told me about it, had started using it and lost over 30 lbs in 4 months from running alone with this. There are different options for setting and achieving goals and best of all the upload of the information to the nike website is fantastic as you can take care of it from any computer, not just yours. For the cost of a decent pedometer, why not spend 15-20 more dollars and get this thing? It wouldn't make sense not to if you are even considering it.