I am very impressed by this amazing "SodaStream Source "machine! It's very convenient to make my own sodas and also prefer to drink it without the flavours. I used cold water and following the instructions. Had beautiful lightly sparkling water on the first button push, and if I want to super fizzy water I will give my second push. Super quickly turn my cold water into refreshing bubbly soda water. By adding in the soda syrups, like the cola, root beer or blackcurrant lime or other flavors from SodaStream, I can turn that soda water into all sorts of soft drinks and fizzy beverages, very easily! Love this super incredible machine! Highly recommend to all!