If the filament supplier has used quality feedstock, then the product you get will be as good as any supplier from any where in the world. As with ANY group of people, there are bad ones, not so bad ones, and even a VERY few good ones. The Chinese are no different in that respect. Since it is an emerging market/supply chain, then there is a period of shady deals. How long that goes on, no one can guess. Some places in the world should be long past this many decades, or even centuries ago, are still having mostly shady operations. Hopefully the overall quality of Chinese goods will improve.

The Chinese cultrure is extremely DIFFERENT than that of western countries, they do not understand us, we do not understand them. This will change.

There was a time when Japanese products were considered to be VERY low quality, now they make some of the finest cars, audio, video, etc., you can find on the planet. On the other hand Russia has had a great opportunity, vast natural resources, and a very large labor force, yet they cannot produce a decent automobile.

It seems that the darker the color of the filament, the more crap they have put in as filler, black has, at times, been impossible to extrude, on the other hand, yellows, and whites very seldom have problems. It is difficult to hide a piece of recycled brown/black crap in a white filament. If you are going to buy cheap filament from a unknown source, you are taking your chances to begin with, the darker the color, the bigger the chance.

You figure out if it is worth the time it takes to clean a clogged nozzle, or the price of a new hot end. It's your money, you can burn it any way you want to.