What can I say, he does exactly what I bought it. And that good! I have tried the opener immediately after receipt and I succeeded at first, a can to open cleanly. This should be self-evident. The device which I have used before, but was unable to. It is true, what is in the product description, there are no sharp edges and the back cover can be loosely fitted. In addition, the can opener fits comfortably in your hand, is easy to set and makes a solid impression processed. For durability, I can not say anything because the opener is only a week with me in use. Therefore, a star less because I can do at this point no statement.