I got the official AK black leather case because the aesthetics of the green case were starting to bug me (doesn't go well with my blue Eletech astute case or brown OTL cable!).

Opted not to go with Dignis, just because I wanted more protection around the dial.
It's black, so there's not much to say aesthetically. It's not crazy black, it's a bit of a lighter shade of black. The leather is very smooth, not textured, and is definitely thicker than the stock case, so I presume it's a little more protective. Certainly feels high quality. It does add a bit of weight vs. the stock case, enough to be noticeable.