Whereas I find them very comfortable, and would by next choice after Recaro! Whereas Sparco's do not suit me at all (shoulder harness holes too low, and uncomfortable). Cobras are beautiful, but my shoulders are too wide for the normal version, and my arse too thin for the XL version.
So it shows that different seats for different bodies.
As for copies: Use at your own peril. I wouldn't trust my life with them. I bought one a few years back as a passenger seat as it would be rarely used... then promptly sold it before fitting it. What if I had an accident and my passenger was injured due to an unsafe seat? I couldn't live with myself. Seats are something you should spend the money on.