Great tool to get to get some specifics about your diet. I would get the knock of version as the subscription to the service is less per month. The business model for Body Bug sucks more than cell phone carriers. You buy the hardware which comes with a subscription. Selling the hardware is futile because a user has to pay as much for the subscription with or without the hardware. After the free period that is included in the hardware purchase ends, you will have a good enough idea of how many calories you intake and burn that you won't find enough value in continuing with an expensive monthly subscription.All the above being said, it is a great tool if you are a big fat guy with zero concept of how many calories you intake and burn. It was a great way to get real numbers that were accurate enough for me to change the way I was eating and level of activity I had each day.