Depending on your application and budget, they may or may not be "worth it" for you. All of our cables are shielded, constructed with very nice cable and connectors that tightly grip RCA jacks, and come with a lifetime warranty. Personally, I would prefer buying one nice set of RCA cables I could use throughout multiple installs rather than buy multiple cheap sets of RCAs. As far as twisted pair goes - unless you have balanced differential outputs/inputs then they're borderline useless. In car audio, differential is very rarely used (symbilink uses it) and when differential isn't used, shielding is the #1 form of noise rejection. Cable routing is still important as always, but even passing over stock wiring can introduce noise, which can be unavoidable in many cars. One last thing - all of our cables are assembled in the USA and tested before we ship them out.