My dad has a harvest right freeze dryer, and I freeze-dried part of my first harvest. He set the max temp at 65f and ran them through. When they were finished, I put them in a Grove bag with some fresh stems. The stems bought the RH back up to 62% within a couple of hours. Once back up, I removed the stems and they stayed right at 62% rh.
My impressions of the freeze-dried bud:
PROS: The bud was dried and cured within 48 hours. At least I assume it was cured, as there was absolutely no grassy taste or smell. The bud smoked good right away and tasted really nice.
The appearance is fantastic. The bud will look almost exactly as it did when you harvested, with no shrinkage or browning.
CONS: The freeze-dried bud didn't age as well as traditional-cured bud, though, as over time it seemed to lose smell and taste. It smokes a bit quicker too. A bowl of freeze-dried is like 1/3 - 1/2 bowl of normal. As a result of drying without shrinking, it feels a little like styrofoam.
In the end, I doubt I will freeze dry any more weed, unless I am out and need it quickly
The traditional cure takes longer, but it also lasts longer and has more complexity. Freeze-dried hash, now, is a different story...