I heard about this watch from all of the media reports which often say how inaccurate the bodymedia watch is and how it simply does not work as well as they claim. Here is one article bashing bodymedia http://techcrunch.com/2013/11/25/if-inaccuracy-were-illegal-the-feds-would-have-to-regulate-most-health-gadgets/ I am writing this review because I acknowledge that it cannot be 100% accurate. Clearly nothing can perfectly measure the amount of calories you consume. It is debatable whether or not they should even include such a feature though I do appreciate the attempt at giving me a number and a goal. The concept works because it forces you to think about exactly what you are doing every day. Out of the various watches that are out there I think this is one of the better ones for fitness.