Well, first reaction when I launched the video: "WHAT!!! ONLY 7 MINUTES INCLUDING THE TRAILER!!!".
For the price, it's really disappointing!
Regarding the trick itself. The effect is great, like
in the trailer. The gimmick is almost invisible. However, to be completely clean, it has to be
removed. Carrying and setting it up on the fly is not really easy in real conditions. The gimmick
has to be replaced by a new one after a couple of setup. There might be a solution for that (and for
the clean up) but these aspects are unfortunatly not treated in this (very short) video. It's a
shame.