Instruct: Classify Amazon reviews into positive or negative sentiment
Query: piece of junk

this product is an absolute rip off. it gives completely different readings even for a stationary object, much less a wiggling baby! we bought this to keep up with our baby's growth and compare her weight to the pediatricians recommendations. Needless to say, the scale was of no help, and only made us overly worried about the wildly varying readings.. we would never recommend this product to any of our friends or family. i hope this product is discontinued, as it is only a wasteful addition of plastic to the environment.