First time to try this, as since 1990 we have only used straight tap water, that has been filtered.
So here is my first impression after stealing a 2 oz sample from the ferment vessel.
The beer is a classic German Pilsner. And is the second attempt at this particular brew, using the exact same recipe as the first one, but with water treatment.
We bumped up the sulfates slightly.
The sample tasted very good...it still has another 7 - 10 days to go. But it was drier in my first impression. Perhaps the dryness made it feel more crisp.
I do not know if this is more or less desirable, but it is a noticeable difference.
In another 7 days we will cold crash it. I do plan to enter this in competition. Right alongside the first Pils, that did not have the water treated.