Understated Blue Black
Well behaved ink with great characteristics, but I prefer a more vibrant and/or saturated blue black. Preferentially I'd give it 3 stars, but it is a very good ink in every way if the color hits your preferences (as is the case with the Sailor Inks IMO). I think Sailor inks are some of the best inks out there and I recommend trying one that suits your preferences since you can find pretty good prices.