I have one and I use it daily. I can't drink sugary carbonated beverages, for some reason it doesn't matter if it is corn syrup, sugar, caffeinated, or whatever it always gives me a headache the next day. However, I love carbonated beverages, can't live on beer, and find flavored carbonated water that doesn't have artificial sweeteners difficult to find and expensive when I do. So, I use my soda stream and add their flavoring extracts. In fact, I am looking into buying a fitting so I can run it off my CO2 tank in my kegerator as my single biggest complaint is that their CO2 refills are absurdly overpriced...$15 for the small size at Bed Bath and Beyond.