I’ve bought tons of knives over the years and have struggled to keep them sharp. Building a sharpener into their knife block was a brilliant move. It’s extremely easy to use (a single lever) and the knife stays in the sharpener the whole time (so it’s way safer than using a steel).  These knives are a great value compared to other full tang knife sets. While I can’t say whether these will stay sharp for the full 10 year warranty period, they’ve stayed perfectly sharp so far and I’ve even used them to break down chickens and cut through beef bones.