I have several of the black ones that I got with a huge order of mini flings I just got (which I am very impressed with BTW, I personally feel they are just as good as the Njoy king, and the mini flings come in 5.4% which is even higher than the King) the only thing about the case I don't like, is that the top cover part doesn't move as smoothly as the Njoy's does. I think this is because of the ego-like rubberized coating on the case getting into the hinges causing it to bind up slightly. It's not as satisfying to flip around in your hand over and over like the Njoy is
luckily I think most of us hunting for the best king-like mini already have tons of the Njoy King cases knocking around the house.
The Fling's case does have an advantage over the Njoy case, the space for the two extra kings in the king case is completely open, so if you only have one extra "cig" in the case it rattles around.
The fling's case has 3 complete round cutouts so that it doesn't matter where or how many 'cigs' you have in the case, it won't rattle. And the rubberized coating is really nice, it matches some of my eGos.
I think I've decided to say eff Njoy.