Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The worst programming buttons ever!

Have had this coffeemaker for about a year, the buttons already don't work. You have to press them 10 times on average to get it to work one time. Finally, the buttons are now failing so we can't program it anymore. Very confusing, and we are intelligent people who've owned many coffee makers in our lifetime. Don't lose the instruction book on this one - you will need it everytime the power goes out or you unplug it and have to start from scratch. Of course, that's if you can get the buttons to work.