This is probably the second time I've ever wired in a cd player. I'm usually intimidated by electrical projects, but once I unwrapped everything and started matching wires, the project started making sense and my confidence grew (Last time I did this without a harness and it was a disaster)
It's so simple to do, I swore I had to be doing something wrong. Just match colors from this harness and the one provided by the stereo manufacturer and connect them however you like (butt connectors, solder etc..). The hardest part is removing and swapping out the old equipment with the new. Anything relating to wiring is taken care of with this harness. $20-25 is well worth the headache you would have without it.