I work with Karen (the first post) so maybe I can clarify what we're looking for. We generally perform fairly close to the audience (less than 5 feet away). We're not concerned with the standard Asrah presentation. We've got another routine worked out and we need a convincing vanish. The floating aspect would be a bonus effect for us, the most important consideration is how convincing the form looks under the cloth. Is it going to pass as a person under the cloth, or is it obviously not a person. Unfortunately, we have heard from two pros we respect (who have seen it demonstrated but have not performed it) that it is not convincing. We are hoping to hear from someone who has actually performed it, or who is a professional illusionist who has seen it performed, that can give another opinion.
Alternatively, if anyone with illusion expereince can recommend another convincing vanish that is portable, can be performed close to the audience and requires only two people, we'd be happy to learn about it too.