I've never used a automatic can-opener, and this is such a game changer. I always worry about leaving trace of metal on the can when I open it using the traditional can opener, so I always wipe the edge after cutting. I tried wiping the edge after using this opener, and to my surprise, there was little metal dust. I really like the opener has a magnet on it, so no more picking the lid from food anymore (you know what I'm talking about if you used traditional can opener before). The only downside is it operate not super fast, so I'd say put it on and let it work on the can, and you can do other things while waiting for it. Of course you can watch it smdo its job, it's actually quite therapeutic, a sense of meditation. Great product!