I had a good idea on how this trick works, you probably do as well, and you're probably right.
I really enjoy performing this effect, it looks great on camera and is extremely fun to witness
the reactions of whom you perform this for. It's extremely visual and requires minimal practice to
perform as well.
However, I do think the negatives outweigh the positives in this case.
Firstly, you have to make your own gimmick, and for the price, I don't think that's very reasonable
especially considering the props are extremely cheap. Also, I think it's important to know you need
to setup before you perform and you have to keep the setup for until you finish performing, which
can be uncomfortable. But that isn't too bad.
Overall it's fun to perform, and if you don't
mind building your own gimmick and having a small setup you're fine.