+1. It's kinda wonky in spots (liquor:grist ratio for US units defaults to gallons:1lb) but is pretty intuitive. Having BeerAlchemy Touch (another $15
) on an iPhone OS device is nice on brewdays.
BIGGEST reason I use BeerAlchemy: It does not consume CPU cycles when idle. This is key -- if I'm hearing fans, I better be at a ballgame!