Instruct: Classify Amazon reviews into positive or negative sentiment
Query: beware of sudden propane expulsion

I bought this stove last year for camping with our paddling club. I had used it only a handful of times when I screwed it together 9/30/06 in preparation for heating my dinner. After hearing a sudden pop and spewing, I discovered the stove was expelling all the contents of the attached propane cylinder through a tiny hole next to the screw-in valve. Another propane cylinder produced the same result. When I tried to plug the tiny hole with a matchstick, it quickly blew out the plug and continued to gush. I have contacted the company, who claim the product is warranted for five years.