In reply to John Kelly:
I bought a pair 3years ago. They are good within their obvious limitations. Only used in winter.
So light that I put both in my pack and let my mate carry the rack.
Very bouncy, great for keeping your runners in, not so great for stopping you from hitting a ledge.
Not as durable as fatter ropes.
Quite a specific use rope and as such, great for the specifics.