After having to throw away a huge amount of freezer burned fish, which my husband packed in ziploc bags, I will always use my foodsaver from here on in.
I had a Deni brand vac sealer, but didn't care for the light weight sealing film. I also found problems with seals failing with the Deni.
After giving up on the Deni, my husband took to using Ziploc Freezer bags, but because of the size, he put too much in and I would end up defrosting 3 pounds of fish at a time, and wasting half usually because nobody here likes leftovers.
I was given the FoodSaver and lots of extras by a friend. The Film is waffled and extra heavy. I have sealed lots of fish and meat since getting this product and have been very satisfied with the performance. The bags can be made to accomodate any portion, the film can even be washed & reused.
I have not yet tried the canister, but after recently tossing some expensive nuts, I think I will soon!