Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Not Recommended

Did not work as advertised. Filled compartment 3/4 with 6 ice cubes and turned it on. It made 2 little ice chips and jammed. With experimentation I determined that it would crush 2 cubes at a time. It took forever to make a glass of crushed ice. Crushed ice size was also very fine, OK for frozen drinks but not high balls.