Used Carbonal loads of times with no issues. Two frames still going strong, one still being used by a 16st ex international prop.
Used Carbonzone with no issues. Wheels have been reliable, well built with great finish.
I’ve had plenty of boutique brands in my time and the finish of the Chinese stuff has often been better. The last off the shelf buy was an On One Dirty Disco that was out of alignment to the point where the rear tyre rubbed – got told to use a smaller tyre and not the one they supplied and specced #retarded
Massive thread on MTBR about Chinese frames. You’ll get most questions answered there.