Looks like an overpriced water filter to me. I use the Model 77 from these people.
Had it for years, itís still on the first filter cartridge. Youíre supposed to change filters yearly, but as long as the water tastes good and the flow is good Iím not worried. I do take it apart and clean it once a year or so.
I still use five gallons RO with two gallons filtered water for beer. A carbon (or ceramic) wonít touch alkalinity. Doesnít filter nitrates, either. Just kidding, that would be RO or distillation.