I love this trick, it's been a staple in my virtual shows and I am sure it will kill when my live
shows come back. It's a well made prop, clever method, great gags and easy to use with some
practice.
The effect does require you to interact off the cuff and improv with some
responses, to add comedy and length to the routine. If you just let them read off the cards it can
be quite boring.
It's a nice trick, probably as strong as the invisible deck but you let
the participants accept the applause as opposed to yourself.
Now I do think it is very very
pricey for what it is... it could be cheaper but none the less I think it would be a fine addition
to any act on Zoom/Stage/Kids shows!