Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Do not buy this product

This vacuum coffee maker is a piece of junk, do not waste your time or money. I tried and failed to make coffee four times with the first unit and again with a replacement unit. The top pot filled with water as it should have, but the filter became plugged no matter what grind was used. Any vacuum created was enough to clear the filter. No amount of tinkering improved the nonstarter performance. The cheap price may be attractive, but don't be fooled - the quality and design are so poor it doesn't work. Do not buy this product.