Sure there are some nuances to learn, ways to use them in non-standard situations, ways to be even more accurate, and there other tweaks you can add, but even without the advanced class stuff incident metering is truly simple and incredibly reliable.
BTW the method I described above is essentially how BTZS finds SBR, they just add a specific number to the result (5 or 6 ????) to translate it into a number that most zone system people understand.
(And o.k. I'll think about writing an article here. No promises on when though.)