What are the thoughts on this copper exhaust gasket? What would be the advantages over a standard exhaust gasket?

http://www.ebay.com/itm/310205601801?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649

On a turbo motor its significantly stronger than a conventional paper/metallic gasket and resists blowing. For a NA motor i cant see any advantages except it might last forever

Copper also conducts heat better, and the more heat you can keep in the exhaust stream the better the turbo performs, since heat = energy. The manifold might get a bit hotter as a result of using a copper gasket, thus keeping the stream a tad warmer.