2l bring the volume of beer is a very good compromise for those who do not consume every day and for those who wish a pleasant change by changing the quality of beer at their own pace. The machine is original, easy to use and produces a beer of similar quality to that of the local bar, at the ideal temperature. The establishment of refills is easy but careful to position the tip in the slot next to the lever under penalty of a small leak drip. The pressure is given by an air pump, but the latter is not in contact with the beer. I took the trouble to destroy a Torp (empty of course) and consists of a double plastic wrap: the beer is in an inside pocket and the air is blown between the bag and the outer casing. So we are a little on the principle of BIB for wine, plastic is flexible, the inner bag is permanently deformed to fit the volume of beer remaining in the device, so there is no risk of Beer is "de-aerating." My only complaints concern the production of foam that is too large and often occupies half of the glass. Certainly, it gradually fades but if it is removed quickly to take advantage of his glass of beer, we are far from having announced 2 liters and soon we lose the equivalent of a glass (25cl) per Torp. I followed the instructions to reduce the volume of foam but the results are not very convincing. Finally I find the pleasure of drinking a beer, even if it may be assumed that this has a cost, is still very high with this device. Torp beer back to at least 8 or 1by glass which must be added 200 for the purchase of the machine. So we are on a base of 1.5 to 2 half on the basis of a small consumption (1 Torp every 15 days) by spreading the cost of the unit of 1 to 2 years. We are far from the price of a single glass can! Torp supply side, the site "the Sub" allows an order with very fast delivery, but I found Torp to the hypermarket in my area (Carrefour) but not yet in my local supermarket (Super U).