The reading on the display is rather difficult, backlighting few seconds when climbing on the scales would feel welcome even change the batteries more often because I weigh myself before breakfast when the light is low, I am obliged to turn on the light and place the scale below to see correctly (and I am not myopic!)
This balance sometimes gives wacky numbers, from one day to another I take 4kg (tare can be a problem?) But I 'm always realize and when I go up again the figure is correct.
Regarding the weight mine is rather precise in 100gr to say it always corresponds with mechanical balances of hospitals but I am not fixing the above, the important thing for me is not to know my weight but rather to know how likely I am: if I enlarged or I mincis ...
I do not use the other functions, there are many methods to calculate BMI and IMG is based of it so as you say that we should not make that information (at face value but rather as an indication and you should know that this n 'is obviously not valid for children under 15, adults over 50, pregnant or nursing women, very muscular people, athletes dendurance high level, and giant people, dwarfs or amputees.
For me this scale deserves 2 stars and a half but I 'put in 3 instead of 2 because at that time I did not have it paid dearly.