The stand out differences in this prop when compared to others are:
-it uses an organic prop
-the box can be shown empty afterwards
-the switching mechanism is a beautiful device that is amazing to watch and easy to operate
You are right, it does take some card skill to pull off. The routine does make this much easier to pull off than many other routines. In the main routine offered the card appeared in the box two times, this makes the routine easier to do and more impressive in the minds of the audience.