Depth of Options
Each operator has their own particular controls, but there are two global controls: intensity, and frequency. These can be used to transition into the effect.
As far as individual controls, VC did their homework and there is little if anything left to be desired. They even threw in a few surprises. For example, one very unique feature is the RGB split control, for the Slide operator, which breaks up a layer's RGB properties and gives your footage a kind of video-tracking-gone-awry effect. Another great little nuance feature is the Lens Blur toggle for the Blur operator, which changes all blurs from a foggy Fast blur to a more cinematic Lens Blur.
Figure 3. Twitch has a plethora of individual functions for each operator. Blur and Slide, in particular, have some interesting features.
Performance
Twitch ran super smoothly on my G5 Mac, After Effects CS3 system, though the usual suspects will slow it down. Obviously, amping up the Blur operator will give your system a hard time. Similarly, checking off all the operators and having them go bananas will slow you down as well. And though you might want to do that once you get Twitch going on your system, you'll quickly find out that Twitch is best used conservatively to give your projects that extra detail in mood or to make a cool quick transitions.
Figure 4. Here is the "Bad Film Gate" preset in action.
