Vaccuum Sealers

Does anyone use these? If so what for? Are they worth it? Or just a runaround?

We us a Foodsaver right off the k-mart shelf. It helps a lot. We use it for our fresh mozz. We buy it buy it by the brick and slice it up…then portion it out for about 2 days worth. It does keep it fresher for about 4 times longer.