We have been chamber vac daily usere for over 10 years. When our pricey name brand machine began to make bad bag seals I checked first for a repair. $445 to send in to replace a pair of unique O-rings. Absurd! The Vevor DZ-260C works faster, quieter, with a far wider and more reliable seal and cost far less than the repair. I miss not having a "Seal Now" button to press which aborts the timed suction period and seals immediately; convenient when trying to judge when to stop the vacuum when bagging soft items like rolls or bread. And I miss the "marinade" function which would speed marinade by cycling through three 18 minute vacuum periods to force air out of meats or fruits and then suck in marinade when the vacuum is released. These are small improvements Vevor should consider. But regardless, this is a far superior machine at a far lower price. If I had to do it again I would buy another DZ-260C in a heartbeat.