Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Sometimes it just doesn't work.

I've used many different timers for 28 years keeping up with my time on billable projects. This is the most disappointing timer I've ever tried. I hit the button thinking I've stopped or started it and often I haven't. I'm working along thinking I'm keeping up with my time but I'm not because the timer never started. Alternately I'll think I've "clocked out" of a project and the little timer keeps plugging away because it ignored me when I pushed the button to stop it.A couple of times I watched to make sure it started then began my work only to learn later it stopped keeping up with my time shortly after I pushed the button.I am baffled that there are some positive reviews here. I really am.