This is a really weird effect. I used this a lot on lead synthesizer and then put a Boss DD3 delay after the flanger and got a very realistic Eddie Jobson lead synthesizer sound. 9 Sound quality is clear and pristine is not noisy.
Effects sounds surprisingly good for a pedal unit.
Using with a JC120 and mixing board and studio monitors. Chords come out interesting, too, since the swell follows your duration of the chord. This is a friends unit that has been on extended loan. The unit is packed into metal case, but the plastic footswitch has broken internally. I can probably fix the problem if I take it apart, but since it's not really mine I'd feel weird about it.