The product complies with the description and the results are displayed (as stated in the booklet) variable and highly dependent on the time of journée.Mais overall I did measures of muscle and visceral fat over five different people (5 profiles different) and I find that with a comparison on the resulting look pretty good. For me the main interest was to keep my muscle and my fat. Regarding the extent of the mass I find very precise (100g almost) .I really recommend this to people who have impedancemeter started playing sports (it motivates to know that gaining muscles even though the total mass does not move).