wii fit3 because it could probably tell you your heart rate and possibly diagnose you with diabetes and, I'm not joking because it really looks like a medical tool you'd see at a hospital and your heart rate is impotent for losing weight, and it could probably tell you your diabetic BY your heart rate and in that case it would probably tell you not to workout and seek medical attention cause if you have heart problems and don't no about it and decide to run for 30mins you could suffer a stroke, heart attack chest pains and that is what the vitality sensor is about, but I could imagine (alasky using it in their trauma team games) but hell why not just sell a bunch of wii defibulators so when a problem really goes down trauma team the game can really give you a tutorial on saving someones life............ the vsenor isn't for people who want games its for casual ppl..........