I've actually been sitting on this ink for awhile and am finally getting around to posting a review.
9 out of 10 times (9.9 out of 10 actually) I prefer blue or blue/black ink, but Ron from Pen Chalet provided me a bottle of this Aurora Black to try a few months back and it almost converted me... ok, not really, but it makes me wonder if I will ever use another black ink again.
I've used several black inks: Noodler's, Kaweco, Lamy, Namiki; the Noodler's was pretty good, but the others seemed to be a thinner, lighter ink that leaves room for more.
When I first put the Aurora Black to the page I was literally surprised at the experience. The ink came out super smooth, wet on the page, and super dark. Like, midnight black type dark.
Another characteristic seems to be the sharpness of the lettering. Granted, this is greatly due to the Rhodia dotPad I use for my day to day fountain pen writing, but even then some inks feather. The Aurora makes crisp and clean lines which adds to the appeal in my book.
Dry times (again, paper considered) range probably between the 15 - 30 second mark which isn't super fast, but fast enough.
Water resistant? Nope. If this is a need for you, the Aurora won't cut it.
Compared to the others I'd tried before that left me wanting, the Aurora stood out and made me think that if I had to convert from blue to black (which is silly) that this would probably be it.
Is Aurora the cheapest bottle of black ink you can buy? No, but I feel it is priced really well for the quality you get. $15 per bottle from Pen Chalet (use promo code CLICKYPOST to save 10%) is actually quite a steal when compared to Iroshizuku or Edelstein at $25 - $35 per bottle.
I'd highly recommend this ink to anyone that is looking for a nice saturated black. Thanks again, Pen Chalet!