I had for my 19 years TANITA a balance (not exactly this model) but équivaux performance. Being at that time an addicted plans! she never let me down and my weight and my body fat and muscle were always the same (I tested several times and the results were always the same). Now I am 28 years old balance still works (I had to change 3 times the batteries) while I weighed 1 time per day (see times !!).
The only downside is the quality of the plastic legs, one of them is completely broken into small pieces, the result now my balance is wobbly, so useless, I looked on the internet and have not found to replace the ...
Result I recommend this product because it is very powerful! and lasts! despite worries that little broken foot (which dates only from last year 2013).