A Rigify course? From Pierrick? Not gonna lie, this was a huge surprise :D
Looks like Pierrick embraced Rigify while working at his new job (animating for Netflix!). He found that Rigify saves him a lot of time... but he was not fully satisfied with some of the rigs, so he improved on them. This course walks you through the customizations and improvements he came up with.
Check out this shoulder action!
And this Face Rig! DAMN!
This course is NOT for beginners. Pierrick's courses tend to be on the difficult side and he specifically says that this one is aimed at intermediate and advanced Blender riggers.
You may ask yourself: "Should I take this course if I've been through CGDive’s 'Rig anything with Rigify'?" I believe there is plenty you can learn from Pierrick, even if you've been through my Rigify courses. While I consider my series of Rigify courses "Advanced", I must admit that Pierrick’s course goes even a level deeper.