Anyone have any experience with Greddy grounding wires?

http://cgi.ebay.com/ebaymotors/GREDD...33219672QQrdZ1

The seller states:

YOU ARE BIDDING ON A BRAND NEW UNIVERSAL GROUND WIRE SYSTEM WITH GREDDY LOGO !!

BRAND NEW IN BOX.

PREVENT POWER LOSS.

ENSURE TOP PERFORMANCE OF IGNITION.

INCREASES THE EFFECTIVENESS OF THE ENTIRE ELECTRICAL SYSTEM.

LOWER THE ELECTRICAL RESISTANCE.

GAINS INSTANT HORSEPOWER 8-10HP.

STABILIZES THE ENGINE AT HIGH RPM'S.

SMOOTHER IDLING & IGNITION STARTING.

BETTER FUEL CONSUMPTION WITH IMPROVED COMBUSTION.

IMPROVES QUALITY OF SOUND SYSTEM.

BATTERY HEAD, ALUMINUM PLATE CONNECTOR, SCREWS & MOUNTING PLATES WILL BE INCLUDED.

Now, I don't believe the instant 8-10 HP gains, but what I want to know is, for $30, is this a piece worth buying for overall performance enhancement?