So glad I finally spent the money on the kit! Took me about 2 hours to install, start to finish. Didn't mount the switch yet though... havent decided where I want it (and it was getting dark and cold).
Did notice that whenever the disc changer switches discs, the music to the aux-in cuts out for a few seconds. Its definitely not a big deal, and I'm guessing this is typical?
Anyway, this is a great mod... Should have done this sooner!