I've looked at this system a couple of times... and here was my "take away". It really didn't seem to save any "wiring" or time for installs... and what it really added was being able to fade the interior lights etc...or keep your stereo on after you've turned the ignition off / until you open the door to exit etc.
So if that's not what you have in mind - i.e., bringing your project up to modern day features - then why bother... but if you think those things make your car cooler or it's just because you want stuff to work that way - then this is the ticket.
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