Instruct: Classify a given review as either positive or negative.
Query: Great diffuser

This works great to spread the heat so that food doesn't burn in spots in the bottom of the pan. Also wanted something that would lower the heat from my gas burners for a slower simmer, and works OK at that. It's a solid cast-iron product, and the handle works well to move it when it's hot. Food can stain it, and it's difficult to clean, but that does not affect its performance.