[c2h5oh]

My sample size of 1: I've been using my X1 for over 3 months and in that time printed about 60-70kg of various filaments: PLA, ASA, PETG. Printer worked out of the box, required no adjustment either at start or after. The only tinkering, if you even can call it that, I've done so far was adjusting nozzle temp by 5C for one specific brand of PETG and capping print speed for silk pla (if you print it too fast it's no longer "silky"). Everything else just prints on default profiles.

If you are printing with enclosure doors closed printer noise is acceptable - I wouldn't sleep in the same room, but I can work (including taking video calls) with printer running 2.5-3m from me. Carbon filter seems to be working nicely too - my air quality monitor isn't picking much VOOCs or fine particulate.

tl;dr; I've had fewer problems with X1 than with any other printer I owned, including laser and inkjet ones.