I have never used the phrase "holy grail" before, but this is without a doubt a "holy grail" foundation for me. I have very oily skin that has a few dry patches. Usually matte foundations look unnatural on me and cling to my dry patches, yet I'm shiny within an hour or two. This is the ONLY foundation out there that lasts all day on me, looks beautiful (I usually only have to blot once halfway through the day), and has not let me down in all kinds of climate (including heat and humidity). I hope it's never discontinued because it's a one of a kind gem!