Best knife sets with electric sharpeners

Top pick: Ninja Foodi NeverDull Premium 17-Piece Knife System. It's the set most people should buy: German stainless blades, a block whose built-in sharpener hones each knife as you pull it out, and the strongest owner ratings of anything here. You never hunt for a separate sharpener.

Who the others suit:

• Ninja NeverDull Essential 12-piece — the same self-sharpening idea in a smaller, cheaper set for a first kitchen.
• Astercook 14- and 17-piece sets — budget picks with a built-in sharpener; fine for a starter or rental.
• IMARKU Japanese sets — for cooks who want harder, thinner Japanese-style blades and a block that sharpens.
• Ninja Foodi NeverDull block alone — if you already own good knives and just want the sharpening block.

Note: most of these sharpen with a built-in pull-through block rather than a plug-in electric motor; the Tefal Eversharp is a standalone pull-through sharpener, not a set.