Instruct: Classify Amazon reviews into positive or negative sentiment
Query: WORTHLESS DO NOT BUY!!!!

Well I bought this because of all the great reviews, but after using it daily and recording my results over the past 90 days and seeing little to no change in my body fat or BMI I was starting to think I wasnt getting great results from my workouts.Truth is I did get good results and the mirror and my true measurements got better, I did the p90x2 program, and have been running on top of it. This device still says my body fat is around 18% and my BMI has stayed around 27 the entire time!! I have stayed on a strict diet and my measurements show much greater results. This device is an electronic piece of junk that just doesn't work!!! Buy a real skin pincher and track your results using a tape measure and save your money. This device will not help you track your results!!!! DO NOT BUY!!! DO NOT BUY!!