Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Water Pic Portable piece of junk

One lasted 6 months, the second one lasted 6 weeks. Will not buy another one to last 6 days. Seems a shame insofar as Water Pic is the brand name for this type of product. Also too bad as I really need one but one that works. The actual problem in both cases is either it will not hold a charge or the switch does not work. In any case don't waste your money.