I really like Brewersfriend and use it as my primary recipe editor. There is an issue that is starting to annoy me quite a bit however. When adding simple sugar to a recipie Brewersfriend shows all of OG, ABV and FG going up. That is wrong, simple sugars ferment out virtually 100%, thus OG and ABV should go up, while FG should go down, signifying a thinner more attenuated beer. Mash temp should also affect the FG, mashing at 156 for 60 min will yield a beer with higer FG than if you mash at 146 for 90 minutes. These are things that beersmith 2 seems to get right, or at least it tries. Brewersfriend really should also get this right so we don't have to adjust the 'custom attenuation' based on experience when designing recipes. I'm editing a recipe right now that Brewersfriend estimates a FG of 1.018 for, I'd expect this beer to be around 1.010 to 1.012 or so from experience. Beersmith estimates 1.009 that is a lot closer to reality.