Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Buttons are horrible

With a stopwatch you want to be certain it will stop whenever you want it to stop, and start whenever you want it to start. I bought three of these because they were cheap, and all three of them does this thing where either pressing the button doesn't work, and when it does work it double clicks and sometimes it works properly. These stopwatches are not reliable.