For the trick itself: The trick is decent. The video shows what you can indeed do with it. It is not
exceptionally well made but will last you a while with care.
For the promo: While the video
itself shows what you can do it doesn't show what you are getting. You are getting an uncut key
while the video shows a cut key. It even shows a cut key saying "...and it looks just like every
ordinary key..."
I do rate it less because it wasn't what was advertised. I would have
preferred the cut key. Due to the way the trick works it would be difficult to have it cut.