This is already our 2.ter Soda Stream. After really long consideration if such a device does any good, we ordered the 1.ten. Since we have a fairly large soda consumption, we then but struggled through. All in all, we were not disappointed. The Soda Stream is quite narrow, easy to use (some tests require one) does not take much space in the kitchen away, perhaps a little high - but this is certainly not to change the cartridge. With a consumption of about 2.5 to 3 liters a day keeps the cartridge just over 3 weeks. These are available in exchange, except the Internet etc. with us in Berlin at Kaufland, dm, Rossmann without any problems for 7.99. However, if like us on some bottles more Should order the other 2 bottles with replacement cartridge requires days on Amazon. The glass bottles can be easily cleaned in the dishwasher and in our experience is a 2.te cartridge not wrong. Both at home and in the garden we had the Saturday evening, the cartridge is already empty and were happy in a spare to have there and not to have to leave again. With the offered syrup varieties each have to try what he likes.