I was very skeptical when I read all the reviews here, until I noticed that almost all the reviews relate to older devices in the series 3. I have a Smart Control Year 2012 at 2013 to buy a "dead stock" cheap. Now after 1.5 years of film my head is broken. Today (within 2 days) Then came the replacement block. I tried it once and can not say anything negative. I even noticed an improvement in the quality of shaving. The "knife block" looks exactly like the original is slightly sharper than the soagar abgentzte. I can not agree with the nagativen reviews.