(je continue en anglais, histoire que les gens autours puissent comprendre au cas ou ^^")
Well, I must admit that the autograph system wasn't anything intuitive, but to be quite honest, the website itself was pretty "clear" with the coupon system, as they explained everything on
the FAQ.
I will give you that they did manage the explanations poorly though and they really didn't help people with "first come first serve".
In fact, that screwed japanese fans alike, as they didn't understood the system one bit, thus only something like 2-3 of them (among 15-20) could get an autograph.
Alas, it seems they really need to have a staff that is more present, with larger support regarding information board (signing desk information was really the only place aside of the website to have details about this system, so yeah, a lot of people were screwed).
I'm however extremely skeptical regarding Nana Mizuki, because she is not known by the french community either, that there may not be any other Nanoha screening next year. Finally, she is so busy in Japan that I can't imagine her paying a visit like this any time soon.