I have a new(ish) QQ and I like it. It s my third Printer, after rapman and fabbster and its lightyears ahead. Only trouble was the rear tower jamming, should have thought of oiling it. The shipment included a geared extruder that made things like FlexiRexi a breeze. Flsun also included a new (thinner) mat for auto-leveling that is much improved. I had to Level again after aboiut 20 prints. Earlier versions seemed to create problems.
The printer comes pre - assembled and is very easy to complete.
I recommend it.