The appliance may look great and work well. But the gas bottle thing is pure money-making. An additional red ring has been fitted to the gas cylinder so that it fits the special cap. All gas cylinders fit all appliances. It's the same with the additional water bottles, not all of them fit all available models. So they make it special to make it more expensive. Because the gas bottle from Soda Stream costs twice as much as one from Migros itself thanks to the additional red ring. Before you make a spontaneous decision, do your research so that you don't end up with the expensive version. I had to return the first device (a different brand) due to a defect, but unfortunately it was sold out. So I opted for this one because it was on promotion and was originally a gift. So that the person had a replacement as quickly as possible. However, I would not choose this device again.
I am very satisfied.