Amazing for espresso machines, calibrate your grind and voila! WIll take you to a cafe in Italy or France.
So far it is mich better (quieter, faster) and seems more long-term built than my Fellow Opus. I liked the Opus, it was just plastic. Grind seems very consistent. I did use my 3-D printer to print off an extra 10° tilt base and cup funnel. I did have about 0.2 gram retention.
The larger chute makes your df54 even better! Easy and quick install.