Instruct: Classify the given Amazon review into its appropriate rating category
Query: Bang for your Buck

This smart scale is so perfect that all I have to do is install an APP and I can see all kinds of data about my weight. And to my surprise the data it records is almost the data I get from the physical examination center. It's not the first time I've used the smart scale, but it's the first time I've been surprised by the smart scale!!!