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For what it's worth, I've found that pre-ground from a decent motorised grinder (Niche in my case) is better than fresh-ground from a basic hand-grinder (Porlex) for a good few days (not been away long enough to notice a cross-over at least). Not sure how the newer, more capable hand grinders stack up though.
mmccarthy-
Interested in how this experience was for you. My basic knowledge of coffee science seems to suggest that oxidation is the thing that kills flavour in coffee beans so increasing surface area by 1000x should do precisely that regardless of how good the initial grind was, and conversely a bad grind will still have some flavour (all of course assuming that beans are reasonably fresh)..
youClown
I’m really tempted for a hand grinder for weekends away. But how much worse can coffee be after 3 - 5 days