This little thing has a lovely character. It's extremely simple to turn static lead sounds form a preset into something magical. Every time when i feel the element in the track needs something to give it some "humanness" or "randomization" i turn to this guy. It just breathes some life into leads and basses.
The only two downsides it has for me are
1) would love it to be stereo, but its not the end of the world, as i can compensate for this after i've resampled the audio back into ableton
2) sometimes the lower frequencies of bass sounds lose a bit of phatness, but again this can be compensated after resampling.
But other than that, it gets used in basically every project, on multiple different elements.
Love it!