Re: Attention Delay Fans (who don't necessarily need the latest & greatest)
The DD-500 is certainly a much more capable pedal, but they lost me with the stomp switches.  One of my most-used sounds is my faux-Andy-Summers flanger+delay.  For 30+ years I have gotten that sound by putting my Boss BF-2 and delay (various DM-2, DD-2, DD-3s) next to each other on the board, and hitting them both together with one stomp.  I CAN'T DO THAT WITH THE DD-500.
I have traditionally had two delays on my board, one for long echos and one set up purely for slapback.  The DD-20 will give me just what I need: several good basic delays, and a few presets to reduce knob-twiddling on stage.  It should be here Monday.  Woohoo!