The important thing is that can trust this nibhas the potential to allow either a steady width line, a very thin line or vary width with pressure

I've used plenty of Speedball nibs without issue, and regularly write with a fountain pen--this thing isn't like either of those--not smooth, not flexible, not unlike writing with a roofing nail!

I can only echo the positive things others have said about it

The nice thing about this "pressure sensitivity" is that it allows you to create a beautiful "ebb and flow" with your artwork.

I've developed an entire line of fountain pens entirely around the Zebra G using a proprietary, custom made (by me) ink feeder system that:1

A lot of tutorials that I've read have recommended the Zebra G for beginners, and I definitely agree that it's a great choice.

Prefer it over the Nikko G (which is too stiff for my hand).