Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Don't bother, it's cheap but it's useless

I purchased this device on the fly while looking for a pulse rate watch. The closest competetion was $50 plus so I thought I'd give it a try. One click buy later I decided to read the reviews! Wow how bad could it be for [item price]? Well, today I received it, the battery was dead and after trying to replace it , a small spring popped out. Ten minutes later I'm still wrestling with it and finally get it together! Then I find another even smaller spring! This review is the last bit of time I will spend on this small poorly designed product. I will read the reviews before I "One Click" next time!