I've had success. However, it should be noted that Speed Seduction is geared towards polyamoury, adultry, and other non-traditional relations. I've found my personality is better suited towards monogamy. I've never quite mastered the art of making Speed Seduction sound natural. Part of it is that I'm a natural pedigogue, so I deal in the realm of the communication of facts in a matter-of-fact manner. (My ideal job would be ISP tech support).
On the other hand, I would say that Ross Jeffries is about as qualified as Paul Scheele in the teaching of magic. "Natural Brilliance" isn't marketed as a magical practice, but I've noticed great areas of overlap between "Natural Brilliance" and the "Beyond Confidence" videos.
I think part of this may be the Daoist underpinnings of both authors. "Speed Seduction" is the application of Tai Chi to language. Tai Chi is the application of Daoism to movement.
On the other hand, Chunyi's "Spring Forest Qigong" is just blowing me away. The stuff is Adamantium. I'd recommend it to anyone. I'd also recommend it as a supliment, and prerequisit, to Speed Seduction. Walking through life with a tremendous "flow" of Qi is attractive.
Although I did it in reverse order, my perscription would be:
1.) Spring Forest Qigong - generate a tremendous amount of healing energy for yourself and others.
2.) Natural Brilliance - become VERY clear on what you want in a relationship.
3.) Beyond Confidence - Focus your will like a laser; become free of your past; learn some additional energized breathing postures
4.) Speed Seduction - Learn how to talk to people on an other-than-concious level.
All-in-all, I think this is over a grand, but it might wind up costing less in the long run.