I dunno whose research you've been reading, but this is french-roasted coffee (or close to it, depending on who's definition you're going by).
It's bitter and ashy, IME, and most of the coffee flavour and sweetness is gone too (once again, my experience).
I don't know what method you'd use to get the best out of it; maybe espresso for something bracing, if that's your thing? I can't imagine brewed french-roast being very enjoyable. I've recently come to appreciate dark roasts for machiattos, but that's too dark for me.
*EDIT* Having another look around, it looks like roasts lighter than what I'd expect could be called "french" roasts... I'd suggest just trying a few dark-roasted coffees and seeing if there's anything you like. High-dosed french press or espresso, if I had to suggest something.