I live in Korea right now and Korean plastic is really expensive (and US imported is way too expensive)... so I have been using cheap China plastic for the past year (really cheap here). The plastic has all been great for me. Honestly haven't found one yet that doesn't work for me and every time I order it is obvious it is coming from a new supplier. I am sure there are bad ones out there, but I haven't found one yet... Some of the China suppliers have their info on the spools and you can find their stuff and but their stuff from them directly (once you find one you like).