I've had my Niche Zero for over five months now. I'm extremely happy with it although I was one of the first adopters reporting a very minor slippage issue. Anyhow the issue is practically nothing to me, so I haven't even tried the solution Niche provided for me. I will of course the next time I will clean the whole thing. Presently I'll have to fine-tune
my setting maybe once or twice in a fortnight by only a one or even a half mark. It is practically nothing.
Anyhow compared with my Pharos there is nothing to complain about Niche. It produces excellent consistent shot from one day to the next and to the next month. Retention has been (without ever playing with RDT) less than 0.1g after the first week or so. Sometimes when I change beans to something completely different it might go even as high as to 0.2g with the first shot. After that it goes back to 0.0g which is quite an achievement.
I'm only using Niche for espresso, but reports have said that it is an amazing all-around grinder for the money. I used to say that Pharos is the best bang-for-the-buck grinder, but for me the early-adopter price 400€ including postage makes Niche Zero a true winner. I think there is nothing you can seriously compare it with. Obviously those who are jumping in later will now have to pay a bit more, but it still is quite cheap for what you get.
I know some people are thinking about Settes, but for me it is not an option. The noise and plastics alone are a no-no for personal reasons.
And for the record I don't do WDT either, just a really good shake in the cup (while placed inverted over the portafilter) like you've seen done with a cocktail shaker in a good old James Bond movie will do the trick.
Some folks have complained about static that will hold grinds in the keeper cup. Maybe it is a climate thing, but mine seems to occasionally do a wee-bit of it as well. But when I weight it it's always less than 0.05g. If that
is a huge problem.... then I'd like to think that maybe espresso is not really your thing.