The Sette 30 is a single-dosing grinder with a fatal flaw: the plastic gearbox cracks, motors burn out, and owners replace parts so often that Baratza's excellent repair support becomes a feature, not a safety net. The stepped adjustment is too coarse for real espresso without a $100 upgrade kit, at which point you're nearly at Sette 270 pricing anyway. Skip this unless you're running a pressurized basket or genuinely enjoy tinkering. For reliable daily grinding without the maintenance drama, spend the extra on an all-metal Eureka Mignon and sleep soundly.
The Niche Zero is the single-dose grinder for people who know they love traditional espresso: medium-dark roasts, chocolatey shots, milk drinks that taste like dessert. It delivers near-zero retention, whisper-quiet operation, and years of reliable service, but the conical burrs that make darker beans sing will flatten fruity Ethiopians into something polite and forgettable. Enough owners have bought a second grinder specifically for light roasts that the pattern is clear. If you're committed to classic espresso profiles and want a grinder that just works, this is still a smart buy; if you're still exploring what you like or already deep into the light roast game, the burr geometry will fight you.