It's been a month since I have this machine and I am delighted with my purchase. Tap water was not really good in my area and filtration rendering very pleasant. The cooling water is perfect. The hot water system is also handy for tea. It is indeed fast and does not generate limestone problem as in a conventional kettle. It makes virtually no noise. Another advantage is easy to clean and filter should not be changed too often. Finally, I got a quick response from customer service to my questions. Would recommend