@Billingsgate, I'm sorry to hear about your negative experience. I have to say, though, I don't know how you can blame the performance of the nib on the overall design of the pen - especially when the experience of so many other buyers has been so positive!
Sounds to me like the pen you received had a problem - maybe with the feed rather than the nib - and I'm glad to hear that Goulet Pens looked after you.
Yes, I also wondered this. Yet I see a similar complaint just below mine, as well as one or two similar remarks on other review sites. So I didn't want to risk even more frustration, and international shipping costs, to try a replacement.
Perhaps I'm new and naive at this whole fountain pen collecting thing. I know some nibs need some slight tuning. Yet I ask myself, at the higher price levels, why should they? When I spend US$250 + shipping for a pen, I don't expect to have to send it to a nibmeister for even more expenditure, like BDarchitect has done, just to get it to work properly. Haven't had any such issues with any other pens, from my outstanding two-dollar Pilot Petit 1's to a costlier Waterman Carene and some Platinum 3776's in-between.
I must add that I bought two Lamy Safaris 20 years ago and so thoroughly disliked how they wrote and felt that it put me off all fountain pens for two decades. Only now rediscovering them. Maybe I just have a thing against German pens.