Instruct: Classify Amazon reviews into positive or negative sentiment
Query: BOTH completely failed to work!

I bought one of these (in a store) and once I got it home saw that it would not project the time propertly - only a blue dot on the ceiling. I took it back to exchange it for another one. This time the buttons only worked intermittently, but I finally got it to work... for about 3 hours. Then the front display screen went completely blank, and the projector would only show "88:88." This has to be the shoddiest product I've run across in years!