We bought the Revolution at QVC and were initially also excited until we found that we could produce up to 25 liters of beverages with it. Judging by the dispaly display on the filling state is then often "empty" after 18 liters. Compared to Handsprudler with which we so he has reached about 50 liters of the same carbon dioxide concentration a 100% higher wear. Also, the equipment had to be sent after 4 weeks already for the first time in repair. Here we turned right on Sodastream and not at QVC. With proof of purchase from QVC this was no problem. They sent us a return sticker makes the shipping free. Very friendly and quick it was at Sodastream well as the repair (1 week). Something to do with the filling pump must have been broken because the streamer constantly fill the water lost. Following repair, this was not quite resolved but if you had a kitchen towel backed erträglich.Mein Conclusion: the only thing the Revolution a decrease is pressing the button for filling carbonated and you have no longer tighten the bottle. Although ..sieht from top and makes somewhere even joy but if the carbon dioxide is therefore twice as expensive because fewer benefits plus even more power consumption .The increase the price of a liter of converted beverage production also considerably. Better to go to the Hand.Hat also the advantage that you during a power failure also fill kann.Der Service of Sodastream said in my complaint about that can only be filled up to 40-45 liters of water if you use only the 1. key of 4 but then I do not have the desired strength of the carbonic acid in the drink. We always took the 3rd button from rechts.Was we really positively found the service would fix itself and the promise that Sodastream the device always free via the warranty period. After expiration of the warranty you must then but for the shipping costs arise to consider seriously the device to sell Sodastream.Wir However, we will be honest and mention the high consumption of carbonated doing or we trade for two hand control gear and give this Christmas.