Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Good Product

Very easy to clean. If you preheat the pan, it does a good job at producing huge, fluffy popovers. But it's a bit difficult to manipulate the hot, preheated pan due to the lack of a handle. Baking hint: don't open the oven door for the first 15 minutes of baking, or the popover may fall.