It's EQ is certainly stronger than a lot of other plugin and the maximiser is nice, it works. No other comment (I only have the elemnts version.) The AI is cool as well.
Ozone 9 ADV has everything needs for digital mastering. AI mastering is not perfect in my opinion, you still needs a lot of works if you rely AI mastering so forget about that function if you have enough knowledge and what's going on.