The ad copy is accurate; no threads, magnets, no glue. That said, the method is unreliable and given
to failure under a number of circumstances.
While I admire the creativity at play here, I
will frankly resort to using a thread to achieve more predicable results. I will give the creator a
few points for the handling of the box to prevent discovery of the gimmick.
The quality of
the sound is poor, the background music at times almost over powering the creator's explanation.