The enclosed, structured bags are very thick and work with the device perfectly, the air is completely sucked. Bread and cakes is really flat as a pancake, but if it is previously frozen, and only then vacuumed, this can be avoided, possibly the suction can also be stopped manually. Similarly, one should proceed even with foods with liquids, otherwise they will be really sucked into the vacuum chamber and cause a mess and do not make neat the weld. Taking into it (read instructions before ...), then you can not go wrong.
Use the following trick also works with cheap bags from discount: Insert a half, thin straw top of the bag. About this "channel" the air can be sucks. Warning, the end of the bag must not cover the intake of the unit in the vacuum chamber. The automatic suction and welding process works just as well as the structured bags, the straw is adhered to. After a short distance above the weld seam trim the edges of straw and again manually set a second seam, so that the end of the straw is below the second seam. This avoided vird that over the not quite dense straw but again entering air, the bag thus remains tight. However, it can be thin at and "measly" bags happen that the seam "welded through" is because the heating capacity of the unit is very high, after all, should actually the thick original bags are sealed properly. The best time to experiment a bit, for me it has worked out perfectly.
