What a SodaStream but does not reveal: The Fizz Chip has no sensors. Rest level and also the amount of CO2 in the drink are advised purely based on the number and length of lever presses. Advised because the amount of CO2 in the drink according to 3x "Pupsgeräusch" is actually quite a bit, the Fizz Chip as still "little" or "medium" indicates. And also has "empty cartridge" already flashed -bar me of since I could gush some drinks. Feels like I would say, because at least 30% were in the cartridge, as the Fizz Chip has been "empty".
Ultimately, this chip is only a marketing gimmick and bring no real benefit. The bubbler itself works like any other course of SodaStream carbonating device also. There's nothing to complain about. But who buys the unit primarily due to the display, do not expect too much.