Decisive for this device was the possibility of folding up ("vertical position") when not in use, space-saving storage in the kitchen without having to put it away in cupboards.
A big plus there by myself for the supplied container in which not only lettuce can be kept fresh, but partly used twist-off jars (homemade jam with me) simply positioned with lightly tightened lid, vacuumed and then again can be fired. Simply remove after the operation again if necessary to cover still continues through something and the next time you open it again makes' blopp ".
Negatives? One easily sees the fingerprints on the aluminum design ;-)