I get stomach upset from my really simple home brew. It really is a beginners home brew. I had brew that smells like garbage that I had to pour out. What I am concerned about is decent tasting home brew that well lets not get into details messes with your bowl movements. Buddy at the home brew store said, if it is contaminated it will taste so rotten you will not likely drink it and I had that a couple of times. This stuff however tastes great but still you know. I have very little equipment at the moment, it's just extract brewing. Can I expect this kinda results from all grain brew that I keg as well? What I am talking about is good taste but you might need a couple of hours to get rid of unpleasant bowl experiences.