It works well 99% of the time. With spring water it should be great. Only in extreme situations (off the charts water, or extreme, extreme [usually dark] beers) will it fail. Understanding water is one of the last things people recommend getting into. Make sure your processes are done first, but I think its kind of fun, and from practicle experience, it helped me undserstand why all my stouts tasted like an ash tray. Chapter 15 really helps.