Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Just another piece of sh$*^ From WaterPic

After going through three portable units from Waterpic in two years, two of the units I repaired multiple times, I decided to go with the plug-in unit, which for some foolish reason I though might be more durable. This is not the case. After about two months of use, the pump is beginning to fail. You might as well just take your money and flush it down the toilet. Clearly this brand manufactures only trash, all of it coming from China, of course.