It is the easiest can opener I've had! Updated my first review which was not flattering!    ! After using different cans I think my review was unfair. I have not had any trouble with shards. The cans I first reviewed were all the same diced tomatoes. No trouble with any other can. Wish it locked on and auto stopped but those are minor details. It works quite well. No shards but any can opener can do that on occasion. I have a magnet nearby just in case.