I live in a hard water area, meaning previously my kettles would be destroyed in a short space of time due to limescale build up and the tea would also have limescale residue and that horrible taste that comes with it. Since using this kettle there have been no such issues. Firstly you can visibly notice the difference in the colour of the tea, it it a lot less murky. I love that you can start boiling the kettle from the point you fill it rather than waiting for it to filter. The kettle boils quickly, although of course slightly longer than a conventional kettle as the water has to filter first. Changing the filter is really easy and there is an indicator at the top when you need to change the filter. The capacity of the kettle is less than others I would say but perfectly fine for 2 large mugs of tea. Overall I am very happy and would never want to go back to a standard kettle.