Political concerns aside, quality can be problematic.
I deal with them for heavy equipment and components in oil and gas production.
They will just absolutely lie about what a sub component is, with fake test results and counterfeit labels. Things like a certain grade of steel pipe not being what they say. Or heat and vibration resistant capacitors from Switzerland being a knock off with a fake label.
So even good faith assemblers in China get garbage passed onto them without them knowing. They have no comprehension of intellectual property or trade names.
And it tends to get worse as you go along. After years of things going well, suddenly garbage starts being shipped.
Long way of saying, it can be great stuff, but very much buyer beware.