I've been using my FlakJaks from GoggleOverstock.com for a good year, and have had zero problems.
They are great goggles, BUT if they get condensation inside the lens, DO NOT WIPE IT OFF! Let it air dry. If you wipe it off, you'll wipe off the antifog coating.
Other than that, great goggles at a great price. Order more than one pair and the shipping stays the same. I ordered a few pairs for my team, and it came out to something like $15 each, shipping included.