The coffee ends up much less acidic and you get to experience more of the flavor of the actual coffee as the acidity isn't taking away from the flavor.
You can still drink it hot or drink over ice (my preference). It takes 12 hours to brew, but you are premaking a concentrate that you keep in the fridge.
Nice thing with a concentrate is you can control how strong you like your coffee on a cup by cup basis...great if 2 people like it different.