The vacuum is excellent: a good test when I evacuated a chicken: it was flattened.
It should actually pay attention to very wet products (some meat or fish), because water (or blood) may rise by suction during the evacuation.
The supplied bags and rolls of the Food Saver brand purchased are of excellent quality and are welded without difficulty. For cons, the unit must cool and hangs when there is too many bags to be treated (vacuum and / or welding). We are obliged to wait until the unit cools.
