well for control you need people to be sitting down, being mature and not all over the place, and there arent many places or times to perform control....even though its impromptu...and so is stigmata....stigmata is more effective and you learna great card force in there... also its very practical and easy and you could do it in a strolling envieronment....
stigmata, so far, is my favorite trick and i would highly reccomend you buy stigmata....