Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Died mysteriously after using it twice

Makes wonderful panini...too bad I only got to use it twice. The third time, I plugged it in and it simply would not turn on. It was a gift and I have found it difficult to get Ace Hardware to replace it rather than having to return it for a refund without being reimbursed for the return shipping. Buyer beware -- not only is this grill evidently prone to problems, but trying to exchange it will turn out to be inconvenient and exasperating.