I've been surprised by these cables. I've never been a fan of stranded cables with single drivers (Horn Shoppe Horns), but this wire has really surprised me. I've been using some nice Neotech solid copper wire and I now prefer this cheapo extension cord. Go figure.
My findings are similar to what others have written; frequency extension and imaging are enhanced, and details are conveyed cleanly. I've listened to my "extension cords" for a while and I'm still pleased with the change.
Thanks for the heads-up, it took me a while to overcome my skepticism to try them.