I bought along the year every color Possible of BPX Series :D
Yes, they are handy and used for easy cable management. I bought them for my home small apartment-studio. Few times a year, maybe I'm Requested to bing my Pa Speakers or Dj gear on small private party's. 95% I soldered my own cables when needed.
Conculusion: As in the title: TOP! For a spare partor color coding, small spare part is in. my opinion 100% worth the price. Who knows, knows! Neutrik connectors/accessories are built for Heavy-Duty Enveiromanets.
For me personally I would like more spare part options like: What to say would like more funky colors Quasi Neon Orange/Green.