Hi. I've been brewing for about two years, all-grain since my third brew, and until recently I always did all of my calculations by hand. I didn't mind that, and I believe it helped me to gain a solid understanding of brewing and recipe creation and the relationships between the ingredients and techniques. But then I tried BeerSmith and I have to say it is the best thing since malted grain. This is great software. I run it under wine on a Linux system. My thanks to the developers for making this software available at a reasonable cost.