Instruct: Classify Amazon reviews into positive or negative sentiment
Query: My wild guess is more accurate . . .

It said I lost 23 pounds in one week! Super! But then it said I put 11 of them back on in one day. Huh? Testing against the scale in the doctor's office showed it ran 5 - 15 pounds light, but not consistently. Today it died. Lifetime litium battery lasted 6 weeks.