If you can convince yourself to spend the money on a chamber sealer you won’t be disappointed. It will pay for itself over time just with the cost of bags. I have had mine 5 years and put up meat, veggies, soups, fish, fruits and so much more. We do half the canning we used too because this thing is so quick and easy to use and food taste great, I feel good lasts longer than vac sealing. Bags cost much less and I feel work much better. 3mm for about everything and I do 5mm for whole fish or bones with no freezer tare yet.
Downside, big and bulky. Can’t travel with it. Takes up a whole corner in my kitchen. Think weighs about 80lbs.