Of the four FP that I've done, I found the nibs to be hit or miss.
I personally am still learning what a good nib writes like. I found a person at work that grew up writing with fountain pens all through school. I've been letting her try each one to tell me how they write and so I can learn too. Just my $.02
I believe it read it from Brian that a left handed person should have a different setup than a righty. I am left handed and will ask Brian if it makes a difference on my next pen.