I have used a FoodSaver for many, many years.  I have learned how to deal with some of its shortcomings.  This Thanksgiving I decided to try my hand at a turducken.  The recipe instructed me to poach the deboned and stuffed chicken then the chicken stuffed deboned duck.  At each step, I used a bag I made from the vacuum seal roll.  By the time they were finished poaching the seal failed.  What a mess.  Otherwise, a very good product.