Any long term experience with VOVOX Excelsus speaker cables?

I am pondering giving the VOVOX Excelsus speaker cables a try.  I am using their digital and XLR cables (both Excelsus) with good results.  Since no one in the US stocks the speaker cable and they are special order from Switzerland I am hoping some of you have experience with these cables in your system.

I am only interested in these particular cables, so no comments on your favorite giant killer, best in the world, vastly superior cables -- just these humble cables from VOVOX.

Thanks and I appreciate the input.