I had initially read some ink reviews where it was said that the Take Sumi;s dry time isn't as fast as other Iroshhizuku inks. Being a lefty I was a little wary to buy it without being able to try it out. Yay for samples!
However, it turns out that my fears were unfounded. It seems to work rather well when I tried it on my Muji Craft Notebook. There isn't much bleedthrough as well. Flow is good. There isn't any shading as far as I could see.
Take Sumi is a solid black ink useful in all professional situation. Another item to add to my wishlist for inks.