I weighed myself at home on these persons scale. Immediately after that I had an appointment with the family doctor. There, too, I can weigh myself with its calibrated scale - on an equal footing.
The difference in weight was 100g.
For me, this is an acceptable result. But I then waive additional bells and whistles. To not offer this level namely.
So strong buy recommendation with 5 stars - this also applies to the purchase.