Got to say I am convinced. The coffee tastes really good, no bitter taste, and it is strong enough for me, though I don't consider it a "concentrate" as some recipies call it.
I grind the beans just before I make it, which improves that flavor. Straining the coffee is a bit of a chore. I pour it through a paper filter inside a wire mesh strainer, changing the a paper once or twice. But it is less work then brewing and chilling hot coffee, and you get a big batch.
Anyone else try this?