Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Some negatives

Having owned this product for 1.5 years, I have noticed a number of negatives:1. Nonstick coating chips *very* easily, much more easily that other nonstick items I own. Even though I am careful not to use abrasives or metal utensils, it is now unusable as the coating flakes into food.2. The upper griddle surface does not get as hot as the lower surface: this is fine when using the unit closed, but when using it open as a griddle the surfaces are not the same temperature.3. Outside surfaces get very hot; you must be very careful so as not to burn yourself.