I had an older model Foodsaver Vacuum Sealer that I used until it just about wore out! Now mind you, it still functions, but the Teflon strip that covers the heating wire (for sealing), has come off. Because of that, all of the bags I try to seal stick to the wire and it's hard to pull the bag away.
Finally, I made up my mind to replace my 'antique' with a newer version of the Foodsaver. After some searching online, I was a little confused as to which model I should buy. They all seemed to do the same thing, but they varied in price. I ended up choosing a basic model that fit my need for food storage.
This newer model Foodsaver is so much easier to use than my older one. All you have to do is put the edge of a storage bag into the vacuum channel, lock the lid, and press a button. In a matter of seconds the air is sucked out and the end is sealed with heat. It resembles the vacuum sealed food products you buy in a grocery store! You can select whether you're sealing dry or moist foods, but I'm not sure what difference this makes. The outcome seems the same either way.
There are times when I don't need to vacuum the air out of the food I'm storing. For example, you wouldn't want to vacuum the air out of a bag of potato chips! The result would be a bag of crumbs! In this case, you simply place the edge of the chip bag on the sealing strip, lock the lid, and press a button. It seals without taking air out. Easy! (Yes, it will seal other bags besides the Foodsaver bags.)
Another feature that I haven't had the need for, is it will vacuum air out of canisters, and seal a lid on the top. The canisters and lids are sold separately, but the hose attachment used to connect the lid and main unit together is included with purchase. You can use a canning jar in place of the canister, but you still need to use the Foodsaver lid to accomplish the vacuum seal. This method is NOT a replacement for water-bath canning, or pressure canning. It's just a way to keep food fresh longer.
On occasion, I've had a vacuum sealed bag leak air inside. Usually this is caused by a wrinkle in the bag during sealing, or an errant food particle that got in the way. Another thing is, it's noisy! It sounds like a mini-lawnmower revving up! But that hasn't stopped me from using this Foodsaver every day!
If you freeze vacuumed sealed veggies, they can be cooked in boiling water, while in the bag.
Freeze softer foods (blueberries, strawberries, lasagna etc.), before vacuuming in bags for storage.
Bags of peanuts and sunflower seeds stay fresher when you reseal and vacuum the air out of their bags.