I may have tried it once but with an echo park and now retro-sonic delay right next to I pretty much just leave it on the spring setting. Octo is great for trippy madness tho, they could charge the same price for a standalone pedal of that-
It is a slapback echo with reverb behind it. It sounds pretty sweet. I hear a lot about reverb not being the best thing to use live, though. I bought the pedal for the Octo setting. I have verb on my Old Flame. I don't use much though...probably can't even hear it live.
I have only messed with the Octo and Echo...I love the idea of the ducking verb too.