I suspect there's not much more that anyone can say about the component quality other than the current observations. The only way to know for sure is to wait for 5-10 years of actual user experience before deciding, or take the leap now and be mentally prepared it may fail in a few years (but that day may never come). I chose the latter.
Fact 1 - The Niche isn't overbuilt like the commercial grinders such as Mazzer, Compak, Caedo, Monolith, Helor etc.
From what I can see, the upper burr carrier is made of plastic, and so is the gear box (external). On the plus side, they can be replaced rather cheaply. A hallmark of good engineering is that the design/spec meets and covers the requirement of usage (not everything has to be overbuilt X times over), which to me it seems to be the case.
Fact 2 - There is no major failure after hundreds/thousand of units delivered.
To me, this is a very good sign if you compare to other newly launched products. No comment about the move of manufacturing location. I hope it's just the location being changed, and not the components themselves. They have a potential winner right there and I wouldn't change the recipe if I were them...
On value of money front, as Australian we do tend to pay more for everything (retailer margin and currency exchange rate). If you look at the single-dosing alternatives, HG1 will be about 1.7k landed (in no way a good value of money), Monolith Conical just above 3k landed. The Sette is cheaper, but I would rate the Niche as being more robust in comparison (as we have not seen any commonly occurring failure for the Niche). So the price point of Niche really did fill up a niche between the two extreme ends.