I buy all my butts, ribs and chuck in large amounts in the cryovacks and My butcher says they are good for 3-5 weeks from the time they get them. I am lucky enough to be able to sort through the cases of meat to get what I want, and he cuts the cardboard cases open for me, so I know they are faily fresh. I don't get any meat from walmart, and very few cuts from sams, usually just ribs from there. I have never had a problem with the meats I have kept in Cryo for over 3 weeks.Just make sure they are sealed. Now when you cut them open, I would recomend that you use the meat within a couple of days. Anyways, for what its worth, just my input.