I have several Kitchen Mama Auto 1.0 can openers in my house and my travel trailer.  I have carpal tunnel and cumulative trauma in my hands, arms, and shoulders.  These can openers have reduced my pain and suffering from using the old other style openers.  I love my kitchen mama openers.  The colors are brilliant and fantastic.  I only wish they would come out with a bright anti-collision orange like the Air Force and Coast Guard use!