I like the sound of old school tape flange on recordings, but don’t like the whooshing of a consistent flanger (I am not Eddie Van Halen). This pedal has a dynamic flange that adds a richness and swirl to your tone, in response to your picking dynamics, but without the whoosh. You can get a subtle background tape-inspired flange, a rich Vibe-like or Rotary-like shimmer, or some real crazy fedback stuff. Lots of variety, but a very musical tone is always really easy to dial in. There is also an envelope filter adding a bit of variety and fun- I can finally play The Relay intro by The Who :).