I am probably late to the game as usual on this thread but I question the value of this grinder from the point of view, that you are paying a substantial whack of money out then expecting to spend more. I presume the burrs are aftermarket specials. The Niche Duo came with industry recognised Mazzer burrs that the designers deemed quite fit for purpose without the need to change. What this grinder is saying is that in order to get ‘better’ coffee you will need to spend more by replacing the burrs with very expensive atom splitting burr sets, so loved by many.
You could make infinite cups of coffee using the stock burrs or whatever burrs you fancy, knowing that so many would be happy and so many would only be happy if they thought the burrs were the latest things…..in other words what is one mans meat is another mans poison and all based on opinion