I recently set up my newest handmade bass, and it sounded good but a little dull. The tailpiece wire was a spliced piece of vectran, a very strong thin synthetic rope. When I knocked on the tailpiece, it sounded damped, and did not ring the way I like to hear. (I want it to sound like a Twin Reverb amp that's been kicked.) I replaced the wire with my usual 3/32" braided stainless steel and everything changed. The instrument became more live, focused and brighter, all qualities I was looking to enhance. So I think the rope could be useful for basses that are too bright or live, where one wants to darken things up a bit, and maybe deaden somewhat. But of course this is only one experience with one particular instrument, and by no means scientifically valid. That said, I think all the claims about thin rope tailpiece cord may be overblown or inaccurate. I'm interested in hearing about other people's experiences with tailpiece cord/wire.