I use gallon size spring water, so there may be traces of who know what in them, but overall the water is very tastey and drinkable. I have brewed about 6 brews with the same type and they proven to be constistently good, and any modiications have been primarily because of recipe (grain bill, hops etc). I am typically an extract or patial mash brewer, and have heard that a high or low pH can cause off flavors, so i want to use better technology. Also, i just started using fermcap, and thought if something like fermcap can make brewing easier, i wonder if there are things that can make my brews better and more consistent, so ive focused my research onto controlling temp and pH. Im trying to take a scientific approach and control as many variables as possible.
I appreciate the replies, and although they are mixed, it seems that enough people swear by it for me to give it a try. Thanks!!