These pens came much sooner than I thought - I was expecting at least a week, but I got them after just a few days.
You can see the difference between nib sizes when drawing, which is great for inking the different parts of your picture, and at the same time, they aren't so different as to look weird together. Plus, the nib size is clearly displayed on each of the pens, so you don't have to take all of the lids off to work it out. They alos seem very good queality, and durable.
I am very happy with these pens, and they are definitely going to be useful in anything to do with art. I would definitely recommend this, especially if you deal with a lot of lineart or comics.