Instruct: Classify Amazon reviews into positive or negative sentiment
Query: This a great clipper!

I've owned this product for over three years and it still trims hair very well. It's easy to operate and handles large amounts of hair at a time. Make sure you clean it before, during, and after usage. Also, lubricate the blade with mineral oil to keep the blade sharp. Heating does occur if you use the product for more than 10 minutes (give or take). Worth every penny!