Instruct: Classify the given review into positive or negative sentiment.
Query: ours just "blew up"

After two years of problem after problem with this product we walked downstairs this morning to discover steam and water all over our bathroom floor. The water heater had completely cracked, in short it blew out in at least three places on the heat exchanger unit. So glad no one was hurt! Needless to say we will be trying to get our money back because this item was still under the 12 year warranty on the exchanger. Based on the comments above I think I may have trouble doing so. Buyer beware.