The workhorse that made hand grinding mainstream: fast, durable, and genuinely excellent at pour-over for half what the boutique grinders cost. The ceiling shows up when you grind fine for espresso (slow, laborious, not worth it) or when you've been brewing long enough to taste the clarity gap between this and a C40. Most daily multi-year reliability and zero regrets, but experienced coffee people treat it as the grinder you graduate from, not to. Buy it if you're starting out, need something compact for travel, or brew filter methods on a budget. Skip it if you're already chasing tasting notes or need a true espresso hand grinder.
The K6 is what happens when a $95 grinder decides to embarrass the $200 competition: grind quality that rivals far pricier machines, 18-micron steps that handle espresso through French press, and metal construction that feels like it'll outlast your countertop. The adjustment ring can jam at extreme settings and need disassembly to reset, and light-roast espresso will give your forearm a workout unless you grab a drill attachment. If you want thick, syrupy body or grind ultra-light naturals daily, this isn't your grinder. But for pour-over devotees, travelers, or anyone tired of blade grinders turning beans into sawdust, the K6 delivers café-quality results without the café-quality price tag.