Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Different readings within seconds

I was really happy with this scale at first. Then the readings begin changing on me within seconds. I stepped on and the scale would say one thing. Then it would change to a pound higher -- while I was still standing on it. Ten seconds later I would have an even higher reading. The readings stay within a pound of each other, but I never know what it really is. I'm planning on replacing it with another scale.