Instruct: Classify a given Amazon review as either positive or negative.
Query: Great when it works, but then catastrophic failure.

I'm on my third one in less than 2 months. I bought the first one at WalMart and within 2 weeks the top of the unit had come off and it was shooting water straight in the air. Who keeps their receipts? So, they exchanged it for me and the new one worked for about a month and a half. Then the same thing. So, I'm on the third one and it's just a matter of time. There is no conceivable way to fix it either.