Easy to use. Comes with several accessories. We tested out the wine bottle sealer and that worked, when you take it off you can hear the air rush back into the bottle.We used the bags and they do a good job of taking out the air, and any moisture that might be in there too, so be careful with that.We haven't used it on jars yet, as not quite the right season for us to do so.When it is done pulling the air out, it will beep at you to let you know it done.