1Zpresso JX Pro S vs Fellow Opus Conical Burr Grinder
At roughly the same price, this is hand grinder versus electric. The 1Zpresso JX Pro S at $139 has large 48mm conical burrs and an external 90-click numbered dial, delivering excellent espresso-to-filter grind quality — but you crank every dose by hand. The Fellow Opus at $195 is an electric single-dose grinder that's quiet, great-looking, and push-button convenient, with espresso capability that's real but fiddly. Choose the JX Pro for grind quality and precise repeatable dialing; choose the Opus for electric convenience and design.
Spec face-off
Bars scaled to the higher value. Coloured = wins that spec.
Full specifications
Strengths & weaknesses
Full comparison
The JX Pro S punches well above its price on pure grind quality: 48mm conical steel burrs (10mm larger than a Comandante C40's), an external adjustment ring with 90 numbered clicks per revolution, and a tight ±0.01mm bearing tolerance that gives it concentricity better than many electric grinders costing more. For espresso, its dialing is both precise and repeatable — you can return to a known click setting. The cost is manual labor: 90-120 seconds for an espresso dose and a 35g capacity that means reloading for French press batches.
The Opus is the convenience side of the trade. It's an electric single-dose grinder with a clean industrial design, low noise, and anti-static catch cups, and it can reach espresso-fine grinds via a hidden inner ring. But its espresso dial-in is convoluted (settings 1-2 plus the inner ring with no numbered reference), and it produces static and some retention at fine settings — so its fine-end consistency trails the JX Pro.
The deciding question is whether you want to grind by hand. The JX Pro gives better, more repeatable espresso grinds and costs less, but every cup is a workout. The Opus costs more and is a bit fussier at the fine end, but it grinds at the push of a button, looks the part on a counter, and suits a single-dose routine.
Buy the JX Pro S ($139) for the best espresso grind quality and precise numbered dialing on a budget, if manual grinding is fine. Buy the Fellow Opus ($195) if electric convenience, quietness, and design matter more than squeezing out the last bit of fine-grind consistency.