I don't want to crap on a specific china made product, but I will say it's the actual quality of machining that is poor. You can have state of the art CNC equipment, but the setup and programming and maintence just as critical. I get chnia import manchinist tools to save the shop some $, but the endmills are crap and the carbides are inferior. I am seeing that 1st hand.
...now, back to quality made rods at hand.