Surprisingly accurate
Before purchasing this I did some online research about fat composition scanners in general (all household scales rely on bioelectrical impedance) and the overall consensus was that this method of measuring fat composition is not very accurate, especially when compared to professional methods such as DXA scans and hydrostatic weighing, so I was pretty sceptical when my wife wanted to purchase one of these.
However, I have to admit, I was pleasantly surprised by the results, I took part in a study a few years ago which involved undergoing a DXA scan and the results I got from these scales was within a couple of percent of my DXA results.
That being said there is no guarantee that will be the case for everyone. Please also remember that the reading you get from this device will vary throughout the day depending on your level of hydration and how moist your skin is. However, if you are going to get one I would strongly recommend you get one like this, where the signal travels between your hands and feet. People store fat in different areas (apple shape, pear shape etc) and scanners that send a signal between feet and hands will be better able to cope with people of all shapes and sizes.
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