Like what I meant by it depends on the costume, for instance, they didn't get up and look closely at my costume mostly for the fact that the main part was my huge Bankai Zabimaru (which was big enough to see from their seats and I had compiled and printed a sort of progress journal of it).
Anyway, actually have no qualmpertaining to the HCC this year. I actually had a blast the entire Otakon. And the at con-registration was not a problem with me. It actually was less nervewracking than refreshing a page, or worrying if they would post the sign-up when you were at work or something.