This is kind of a 3,5 shlock, as the 2nd season is somewhat lackluster & the third is kind of 50-50 in goodness and boredom, but all in all I guess DD remains the flagship of Netflix-Marvels. Much of its "edgy" sheen boils down to only a few episodes with awesomely choreographed and shot fighting sequences, namely "Blindsided" (S03E04) and a few episodes on the first season, the name of which I have forgotten.
I'm not a comics maniac, but I easily managed to follow the entire series, therefore I deduce that this must have been good (the first one, I mean). Besides Charlie Cox, who, in addition, is also super duper handsome here.
By putting this show on Netflix, we got a series that was targeted at adults with deeper character studies with broken psychés, violence with gory consequence and religion having a heavy part of it. Heavy on repeating itself and was so intent on being realistic that it had an allergy in putting it's lead in his own costume. After the shock of the first season's violence and edge it started to lose it's edge though.