Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Inaccurate & inconsistent

The title says it all. Just bought it and went for my first reading. It seemed lower than I thought - so I stood on it again - completely different weight. So I stood on it again... Every time I stand on it, it gives me a different reading. What's the point of weighing yourself if the scale tells you a different weight every time you stand on it?