I've been using a Food Saver vacuum sealer for about 4 years. For the past 15 years I have been butchering my own game and when I used butcher paper, no matter how careful I was, I always ended up with some freezer burn. Using the vacuum sealer I even have found a package of 2 year old venison that got shoved to the back of the chest freezer, cooked it, and it was still great.

I also like using mine for fish. I like to go salt water fishing a couple times a year and when I do I love to bring some fish home. I used to freeze the fish in water, so it would keep, but those blocks of ice took up alot of room in the freeze. With the vacuum sealer I can freeze whole or fileted fish in 1/3 to 1/2 of the space need before.
Oh yeah, everything I marinade is done under vacuum. the marinade really penetrates the meat.Mmm Mmm good.