I have his hooked to my floor monitors and main PA. No problem so far.
The jacket is sturdy enough and seems to be better than the gray one. It has this slippy rubbery feel. I haven't soldered, but the speakons are fixing nicely. The wires are actual copper.
What i find important about cables, is the possibility to roll them together without needing to force the twist in. This one is actually nice to twist together and seems sturdy enough.