DCC Concepts Zen Black Decoder Review - Just how good is their ABC?

DCC Concepts Zen Black decoders are being recommended by other Model Railway YouTubers for their comprehensive ABC implementation.

Does it live up to the hype? Can I use this decoder on my fully-wired-for-ABC layout? Let's find out!

Table of Contents:
00:00 - Zen Black ZN218.6
00:57 - Decoder not recognised by JMRI
02:02 - The Manual (What's there, and what's conspicuously not)
02:40 - Sanity Checking on the DCC Concepts Forum
03:05 - Different Constant Distance ABC Braking implementations
04:48 - Testing the decoder's braking distance
07:11 - Understanding what has been implemented
08:20 - Testing the decoder's response with no.2 end leading
10:13 - Conclusions about the decoder
10:43 - Conclusions about the company