Have I mentioned how happy this game makes me? :)
I loved the fact that I had to figure out the recipes just like someone's first day on the job (uh, yeah, im an alchemist)
This kept some mystery and challenge if there were a recipe list the game wouldn't hold as much of my attention and the reward for finding the recipe not so sweet.
This is exactly the types of games that I play, challenging, rewarding, no time pressure.