Instruct: Classify Amazon reviews into positive or negative sentiment
Query: The best can opener ever!

I am so impressed with this can opener. It is so easy to use and truly leaves both the lid and the can with smooth edges. It has easily opened every can so far. It feels good in your hands and is easy to turn. Someone with severe arthritis may have trouble using it. Maybe they could come up with an electric version for those who have trouble using a manual can opener.