I had a negative opinion I corrected. This machine is not very powerful suction, but you can not blame him given the price of the most powerful devices. With proper technique, manages to make a sufficient vacuum for home use. We must put the food on a flat surface such container, cut the bag to the exact size of the tray, and keep everything well horizontal level with the vacuum cleaner. For cons, the system to print is zero. Perhaps, if there was a manual ....