I took a few leftover packs of king from last June and smoked them last week, they had that freezer smell but no burn, finished product came out good. Not like fresh obviously, but still what I would consider good and I am highly critical of my product. I have some coho from last fall that needs to go next, thinner and less oil, they are more succeptible to freezer burn even while vacuum sealed. I always make sure to poke a hole in the bag before I thaw it so it retains the moisture and oil.