I used it for instant hot water into my frensh press or aero-press (the latter of which makes a great cup of coffee, better than french press if anyone is interested)
I don't like the taste of the paper filter you get with the aero-press. I prefer my French press for preparing my homegrown coffee.
Also, water heating chambers build up scale, which add flavors to the water too.
Yeah, you probably drink that crappy Kona coffee.