I have 2 food saver vac units. I replace them about every 3 years. They don't last long and there are no repair parts available, nor repair centers. They are the ""use til quit, then toss"" machines. If you have a few bags to do, they work nice. If you have 2 deer or a whole cow to do, you better have 2. They will overheat and stop working with about 20 to 30 bags. That's why I keep 2 at all times. They will work again after cool down, for 2 to 4 years, then stop totally.