Instruct: Classify a given Amazon review into positive or negative sentiment.
Query: Do Not Order If You Are Getting the 1000 Or 600 mg Scales

Amazon recommends this product as a calibration weight if you are ordering the 600 mg or the 1000 mg electronic scales. I ordered the two recommended weights, hoping to cut through some of the nonsense, and was dismayed to find that neither of them was useful. The two scales that I mentioned, both of them, require a 500 mg calibration weight. There is no way to change the calibration weight required, so if you ordered this weight you are out of luck, unless you want to pay postage to get three dollars back.