I use a Food Saver vac. Takes a small bit of storage space. It's dedicated for coffee (a dry, non-drippy commodity) and there are none of the cleaning issues that would be a problem if I shared the machine w/ leftover bbq chicken wings. Bags seem costly and wasteful. But hey! Vac and freeze, and I don't sweat the minuscule degradation, if any, which is certainly within the margin of error I raise with multiple other variables.
Like so many home decisions, this one requires a sense of proportion. Fresh roast used at prime hour of rest is best. Less than that, you have to make some compromises. In my case, I try to keep coffee and life to compromises that don't bite me, but now we are getting into life circumstances that vary widely. So, I suggest that people try vac and freeze. If you hate it, use the machine to save your chicken wings for a cloudy day. Or sell it. Or put it with all the other stupid things you've bought in the last 20 yrs.
Better add this:
