the only real thing I can see except for the size is that due to the workings as I understand them you can tip / put the card / note into the empty box, this quite important trait was not very clear on the trailer, if this is correct then you could have signed folded card placed in the box in view all the time and have there card appear around you neck or other impossible location / or use it as a billet switch thingummy bob.
its an improvement on the clarity box, I don't have either, but it remains to be seen if its cherry coke (an unnecessary improvement) or diet coke.
