Extrude Hone

[P2Motorsport240sx]

Does any one know someone or has used Extrude Hone on an intake mainfold or head? I would like to know if the $500 was worth it for the intake mainfold? It seems to me that extrude honing a manifold would be far better than standard methods of honing. As far as the head goes do they work the valve are at all? Do they seat new valves for you after there done honing or do you have to have a machine shop do it for you after?

I want o build my KA24DE the best way possible and this seems do be it but i'd like to know others experinces.