Are these the shoes with no soles that are meant to help your vertical? If so they do work, but so do about hundreds of other gadgets to help you jump higher. Anything that works your legs will help.
I would recommend looking into plyometrics if that is what you are looking at. Great effects without the cost.
Here is a link, but information and routines are all over the net.
If that is not what you are looking for...please disregard.
