I’ve had a couple of the Chinese kits.
The Caterham I have is pretty good quality.
The Millennium Falcon (the £165 Lego job) which so far isn’t too bad (stopped building when we moved house), only issue was one of the figures has dodgy legs, which is easily solved by getting another individual Lego figure.
Although on the other hand we got the Lego Harry Potter Hogwarts Castle (small version) and Fantastic Beasts suitcase the other day for the kids. You can definitely notice the difference in quality.
I don’t mind the Chinese stuff as all it does is sits on the shelf in my office at home once it’s built.