Hands off !! Scale weighs very inaccurate !!

I bought the scale of shepherds, because of the positive review on Amazon. I can not share the positive reviews. I tested the scale at various points of my apartment. Every time a different result, sometimes I weighed 78 kg, sometimes up to 85 Kg. It was enough even out to shift the balance on flat tile floor in the bathroom, just 50 cm, I weighed already held previously 80Kg, now 82 Kg. If I I weighed in the same place for the 2nd time, then the balance actually showed the same weight.
But that's not a truly reliable weight to determine. Therefore, hands off and spend a little more for a Libra!

update:
I have now bought the scales of Soehnle 61350. Only a little more expensive than the shepherd scale, but the Soehnle weighs as his should. No matter where I place the scales, always equal weight. A difference like night and day. As I weigh my suitcase with the scales before traveling, I'm glad about the precise weight display. What it would check for a surprise when the suitcases are suddenly 2 kg heavier than previously weighed? An expensive surprise. Incidentally, the Soehnle has hundreds of positive reviews on Amazon. The scale of Shepherd's where it belongs, in the garbage can.