Being able to see the waveform behind your modulation curve makes editing highly intuitive.
You cannot currently add multiple instances of the same effect (e.g., two filters) within one plugin instance.
Experts at MusicRadar and MusicTech highlight several pros and cons:
There is no native AAX version, requiring a wrapper like Blue Cat's Patchwork to run in Pro Tools. Community Perspectives
While powerful, the deep modulation options can be overwhelming for beginners.