Don't know about product quality but their business practices are dubious to say the least.
Most of their brake parts are made for/by Yana Shiki in Taiwan and then sold under the Bremzen brand. Perhaps this particular set of rotors is US made
but given the fact that all the rest of their products are made in Asia I would take the US-made statement cum grano salis
. As the claim that their products are better than Galfer, Spiegler etc (yes, I saw the ads).
Perhaps their discs are good quality on par with OE but would you do business with someone making such dubious claims?