anker, being a Chinese manufacturer, doesn't have much chance to penetrate the western markets. even assuming they can develop a dependable product. but I wouldn't trust more than a headphone, or a wall charger from them.
I agree on being careful with China goods in general, but Anker is one of the very few very trustworthy brands out there. IIRC, the only fuck-up regarding batteries they did was with the 535 power banks, and they handled that one very solidly [1].