Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Learning curve

This works great for cutting circles. It does require some practice to get it to work effectively and efficiently. I recommend getting a self-healing mat to use with this product. My hand did get a little sore after using this since it takes some force to press down the center stopper. I also taped my paper down to ensure it wouldn't move. The circles aren't always perfect but more practice helps with that.