Well, I just bought a Food Saver, and wondered if the money is well spent, or should I return it before I open the package? What are the advantages of one, over dehydrated food, or do you use it with dehydrated food to increase the shelf life? I've heard others hikers say they use one, saw it was on sale, so got it for an advance Christmas present to myself. But now I'm reconsidering since I don't know exactly what they are good for.