me on a learning curve with beersmith - only fed a few brews through.
love their database on ingredients, beer styles etc. got a bit overrawed by it's depth, but decided to work on one new facet when up for it. so not yet doing efficiencies, but just mastered hop balances. gets better as i go along. on the one side, i think it would be unusual if you could jump on and master it in one brew. on the other hand, if you don't try to take the whole thing on in one go, then the bits that you've got under control are really really good.
my one complaint (and it could be false cos maybe i haven't found the tool) is that it doesn't add the 0.5% ish alc for priming sugar. or maybe that's automatically in there.
but yeah - money well spent in any event.