I have had my vacmaster chamber sealer for a little over a year. Probably ran through around 2-300 bags. I use the 8x10 3mil bags with no issues. My last batch I bought is the 5mil. I use it mostly for salmon. I could never go back to a food saver again. It is big and heavy but we use it all the time. My 9 year old is a pro using it. i just bag stuff and hand it to her and she places it in there and closes the lid. One of my favorite purchases ever!