We received the Foodsaver one as a gift... used it twice, put it away and until recently, rarely used it....
In the past month or so, though, we've started using it more and more....
The bags can be reused (but they get shortened by about an inch each time)
Upon arrival from the grocery store, all our meats are vacuum sealed.. we add the seasonings, such as Lowery's, before sealing them... Then, either toss them in the freezer or fridge, depending on how long til we eat them. Some things that are almost beyond belief: Bought a 5 pound block of mozzarella (because it was $1.40 a pound vs. 2.99 for an 8 oz package of shredded stuff (5.98 a pound)... Used some, resealed the bag... used some, resealed the same bag... etc. The cheese *never* got moldy, where normally, there would have been mold on it within a week. I haven't seen the black and decker ones, but you definitely want one that sucks the air out... (meaning, the walmart ones are no more useful than baggies)
this thread... right after the hungry/pizza thread... I'm starving now! But, marinated boneless skinless chicken breasts await my grilling when I get home. 🙂