Used after a similar filter with three cartridges and without a tank. Buck is definitely a nice feature! The taste of mineralized water is a bit strange. I still can't get used to it. With its pros: Easy to set up. There is a tank for filtered water, which saves time, as you do not have to wait for a trickle to fill a glass / bottle. Different cons: No. Unless 4 cartridges will be more expensive to change than three.
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