I've been researching these two chamber vacuum sealers, and I feel I've got a fairly good handle on the pros/cons.
VP215 has a rotary oil pump that will last longer, but requires maintenance, and it weighs 40 pounds more.
Polyscience 300 has a dry piston pump that won't seal quite as well, and won't stand up to the same amount of use as the rotary oil pump, but it weighs 40 pounds less and has an accessory port. It can also seal a 12'' bag as opposed to a 10'' bag. Also more versatile controls.
My question, if someone is farther down this rabbit hole than I am, is mostly if the polyscience will stand up to the use of a 4 person household for just about ever. I'm not sure if the benefits of the rotary oil pump will factor in for using it 3-4x a week for a family of four. I like to buy things that I can reasonably expect to last a very long time, and I want to make sure I do that with this purchase. Aside from the pump difference, I like everything about the Polyscience better, and am leaning toward that unit. Thoughts?