I like the NB treatment, but there are some guns that look and work so good stock that I wouldn't have the NB treatment done to them. I wouldn't alter a Daniel Defense AR one bit. I haven't seen NB in black yet, but I don't think I could bring myself to have it done to certain Sigs, for example. Certain Sigs look good in certain finishes (ala the 'Equinox' finish) but some guns just seem meant to be BLACK all the way and I imagine some folks feel that way about their M&P's, as it's a helluva handsome sidearm right out of the box. For that matter, I want to reach for the Pepto Bismol when I see a S&W revolver with pink grips.....