Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Inferior shuffler

The shuffler battery cover kept falling off until I taped it down. The shuffler often pulls in several cards at a time and gets stuck.The side openings seem to be too large. Less frequently the cards come into the tray at right angles, requiring manual intervention. I have bought this shuffler before, and it worked much better--manufacturing quality control seems to be somewhat lacking.