Well, as I stated before, I'd use it in most close combat situations, since controlling the rope, cord or chain is done through mental command. One could use it to restrain the opponent right as you close in, combined with NB Tai, its quite bad ass.
Combined with my Nekura cloak, and the chains, ropes or cords, I'd have no issue with small weapons like kunai, shuriken etc. Another useful way would to get out of a fissure or pit, swing from a large summon or a forest like terrain.
Charging chakra through the ropes, cords or chains, also have effect though I am not sure which I can use yet.
Plus, one can even use it to break out Genjutsu, by letting the chains, ropes or cords cut you with a kunai, or simply lash through a part of your body, depending on rank. I might even create a Sound technique to use in conjunction with the CFS, though the Sound infusion would possibly work.
That's some uses I can think of.