Reply to delay pedals for live DJ sets?

anybody using a delay pedal for live DJ sets?

I'm looking for something interesting, left of center - not just for straight dubs, but maybe for some crazier effects, maybe on some synths, etc.

I've been believeing about the Boss RE-20, but I'd love to know what else out there is being used by other DJs.

I also would be into something with a "hold" function, but its not necessary...

thanks in advance for the advice!