Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Brand New Pyrex Dish Exploded in Oven

I have used Pyrex for years and always thought these dishes were pretty durable. Today I bought a new one, filled it with cake mix at room temperature, and placed it in a 350 degree oven. It exploded about 15 minutes later, leaving shards of glass everywhere in a major league mess. After a Google search, I was shocked to find that there are numerous reports about exploding Pyrex. Apparently the official explanation has something to do with thermal shock, but why would you sell a dish for baking if it's subject to thermal shock? I'm swearing off the product and feel I must warn others.