Quality is for sure a matter of personal idea, but not only. The thickness of a centre band tread is certainly objective and measurable: from it the quality of a kit can be evaluated.
Quality is also a matter of national idea. Most of the kits much sought after in the States would not be priced a penny, a dime or a centime here in France, because an industrially stamped metal decoration made by tens of thousands is usually not worth a lot of money for our eyes. I don't mean it's ugly, it is just a matter of taste depending mostly of the history of crafts we are used to see and touch.
Quality has also to see with concurrence, I mean what people are used to be attracted by. I think that not a single pen addict used to Montblanc and S.T. Dupont would buy a Majestic. But they can love kitless. Propose a Majestic on FP Network.uk just to check...
Kits, what are they? Something designed to be inexpensive to make, that could be sold to somebody who cannot thread. Not a lot to see with what we name quality. Well, it is shortly said, but it is sure part of the truth.
But to answer your question, a
Beaufort Mistral is for sure a well designed kit with a lot of objective qualities. And if you want to began to take distances with kits, I would advice a
Blingless from Timberbits, a high quality craftsmanship.