Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Cheap in cost and quality

I bought 4 of these for counting reps when doing physical therapy exercises. They're great for that purpose--when they work. I was glad I bought so many at once since 2 of them stopped working within 6 weeks of use. One of them got hung up on the "1" in the units column (column on the right). The other would not count up unless you pushed the button at a precise angle. I didn't return them since it would have cost almost as much for shipping and handling as the units were worth. Unfortunately, there isn't much choice out there unless you go to an electronic counter.