I will still be measuring the crap out of everything with my pH meter. I also know that you can't base much on a sample of one. My water dept. gave me ranges for all parameters so I'm using averages on anything I can't measure at home so I wasn't expecting to be pinpoint accurate. Still, predicted alot closer than anything else i've used. I'm just playing around with it at this point. It is a very good program and is actually pretty fun to use once I got the right software to run it. I'm doing a Kolsch and an Alt for my next two brews. Looking forward to using it.