I bought this to reduce impurities in the water as my husband uses a catheter and it was blocking up all the time. I have to say that it has helped greatly with this. Also my kettle is much cleaner and there is no scum on the top of the tea/coffee. The only downside is that when full it is heavy and it will not fit in my fridge door. I just decant the filtered water into a jug then put it in the fridge. I never have a drink without using the filtered water and it had just become part of my routine to keep it filled and also have some in the fridge all the time. It is easy to clean and the indicator on the top is very useful.