A self sharpening block makes perfect knives maintenance free!  Zwilling Pro knives are my absolute favorite knives for every cutting task.  Once you put one of these knives in your hand I'd be surprised if you ever want another.  The first thing you notice is how perfectly weighted they are in your hand and then you notice that perfect curved bolster and how once you put your thumb and forefinger in the pinch grip position these knives truly become an extension of your hand.  Fabricated from German steel that is formulated to be corrosion resistant these knives are put through a patented ice hardening process that leaves them crack and chip resistant.  Your knives are sharpened every time you take them out of the block and these blocks have been shown to leave your knife as sharp as the factory edge.