I used these for unbalanced patch ables for floor/pedal use, and in that context, they are excellent (well, arguably over-engineered).
I would also recommend it for making longer instrument cables, except in very toughest, roughest on-stage situations (in which case have a look at Sommer's The Spirit).
Flexible (given the diameter), well-built, and easy to handle, and east to solder. Excellent signal transmission, and, for an unbalanced cable, low noise.
That's the pros. Cons? None. Highly recommended.