Xindak cables: how good are they?

An aquaintance has been saying how good the Xindak speaker cables and interconnects are(as well as the power cords. He says that they are giant killers and better than many far more expensive cables. I read the review in Stereotimes. I am more interested in the Gold cables or the F2 (one down from the top of the line). Has anyone else heard these and what are your impression of these items?