zoom, bseemba..........the electronic scale is accurate but you have to help it to be. if you went to a university or anyplace they did "real" electrical impedance testing, you would note that they attach the electrodes to one of your hands and one of your feet. the electricity flows in through one and out through the other. on the big machines, you get a true measure of where you are bodyfat wise. moreover, the measurement is taken in the morning, after voiding, before any intake and before you have been up walkijng around a whole lot so the fluid is spread out in your body. the test is totally related to how much water is in your body. you could take a measurement, drink a bunch of water and get a different measurement. the reason i dont believe in them is because they do not measure your whole body. as i said before , the current goes in one hand (foot) and out the other hand (foot) depending on whether you have the kind you stand on or the one you hold in two hands. this would effectively measure either the fat between your two hands or whatever you have on the path between your two feet. (i can hear the jokes about that already) if you are just tracking your bodyfat, like wondering if its trending up or down, these work fine but over all, a good set of calipers is hard to beat. just make sure all measurements are done at the same time of day, usually morning and before you eat or drink.