I've been working with that effect, originally with the intent of having it as a backup for my talkbox. If you are thinking along those lines, put a harmonic-rich gainy distortion in a stomp position ahead of it. Doing that will give the filter a more complex signal to process, and the effect will be much more dramatic.
Another really interesting use for this effect is as a harmonic filter with a manually set value. It is possible to use one or more instances of it tuned to different harmonics of the fundamental note you are playing. I've gotten several decidedly non-guitar tones using this, along with bandpass filters.
I want to make them a little less cartoonish, and a little more musically useful, and record a sample of each one before posting. You should start to hear something within a week