This usually works great on either straight or coiled cords. I have gotten quite good, and fast, at putting the coils back in the right place on coiled cords after cleaning them. Dick Lavender from The Phone Shoppe in Michigan suggests putting a wooden dowel rod down the middle of the cord, then wiping the cord. Another alternative is to put the cord cleaner in a large Tupperware type container or a pail, and let the cords soak overnight and wipe them clean. Be sure to cover the container to prevent evaporation.
Ink is hard to get off of cords, since it tends to soak into the plastic on the cord.
It probably cleans a little faster than our General Telephone Cleaner or Super 7000, but since it's an aerosol can, it's more expensive to use. It does an amazing job on anything around the office, including KSUs and computers. The first time I tried it, I just wiped the black stuff that had been accumulating around my monitor screen off in one wipe. Even our powerful Super 7000 had a hard time with that black stuff. It will take anything off of anything that's not real porous.