Instruct: Classify Amazon reviews into positive or negative sentiment
Query: not very good

These pans really dissapointed me. They quickly warped and could not get the sticky cooking spray film off once baked in the oven. The Norpo Stainless steel Jelly Roll pan that I purchased at the same time as lasted much better. Not sure why because they are the same brand, but this one lasted about 2 months before I trashed it.