Has some pros: It filters water perfectly (the water is very hard), the softening cartridge is enough for two adults for 2 months. Has cons: For a long time I struggled with a leak from under 2 and 3 flasks, in one of them the O-rings were installed incorrectly (you need to swap them), after 11 months of operation, the fitting burst, whoever has these installed, I recommend immediately replacing them with better ones.
I decided to add some photos to give others a taste of what I experienced.
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