I use these all the time!  I use it for packaging deer and fish after processing it.  I also use it to repackage meats I have purchased on discount from the store and plan to freeze.  These rolls give me the option of creating any bag size I need when I need it.  Sealing meats and vegetables has saved me so much in wasted dollars over any other method of packaging I have ever used!  No Freezer burn and everything lasts so much longer in the freezer!