OK, first off I am very impressed with the database selections and the software as a whole. I used BeerSmith, and Beer Tools Pro, Pro Mash, and I currently use BeerSmith 2 as my primary brewing software. HOWEVER, I am currently doing a review of free alternatives and I came across Brewtarget. I can honestly say that if I did not already have a license for all the software I have, I would EASILY make brewtarget my choice. According to my tests the recipe numbers came out very close to my beersmith recipe numbers, and I have beersmith dialed in. I took about 5 minutes to figure out Brewtarget and could get almost all my numbers right in line. I applaud you for putting the time in for an open source option and not only that, but doing an outstanding job. On my blog I am happily giving you a glowing review and will highly suggest it if someone does not have the beersmith license already. This is a top notch open source option. You have everything people are looking for (except inventory which I personally don't use). But you have included scaling, timers, conversion tools. The only gripe I have would be I would like to see a more concise mash options. But what you included is very workable. I give you a solid A on this software.