After reading about the UMAI bags, had to give it a try, went to Sam's last Saturday, and bought a 16.89# piece. My automated Foodsaver (model 3425) didn't work at all, went to Wally world and bought a fully manual 2000 series unit, this one did the trick. I'm 7 days in right now... trying to keep busy with the SI 3D so i can make the wait less painfull ;D