I've not stated the chemistry is no good. On the opposite, I've stated it may be good. But I don't believe in miracles. I've heard only two experiences; the first one is yours; the cleanest negs ever. The other one was here at APUG. They were worst ever and had terrible goo. This is probably an user error, though, at least partially.
We have to be a bit skeptical on products that promise miracles and that are sold by arguing that they are better than others. Kodak and Fuji don't do this as they need to care a bit more about their image. They can't live on the niche market.
What I say is that I don't believe all of the promises. I find official C-41 chemistries very, very good. I also remember Maco-Rollei's marketing goofs quite well.