Has anyone tried the electronic rust protection systems?

Counteract out of Australia is an expensive one; there is one called
Electro-Shield which JC Whitney sells for $99, but seems to require
you to apply a clear paint sealant every year.

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HOW IT WORKS. Salt and other pollutants combine with water and
humidity to create a kind of diluted "battery acid." When this "acid"
comes in contact with metal, an electrical imbalance causes electrons
to migrate from the "anode" portions of your car's metal parts to the
"cathode" portions. Positive ions of metal are left behind to unite
with negative oxygen ions to produce corrosion and rust.
ELECTRO-SHIELD� provides an artificial source of electrons to restore
the electrical imbalance and slow corrosion. Also, it discharges
electrons to build up on those areas where the protective coating
(paint, etc.) has been damaged, thus interfering with the formation
of rust.

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Does anyone out there have any direct experience with these type of products?

Thanks,
Paul