The maximum delay time of this mono pedal is about 300ms and therefore rather short, but especially those, who love oscillation will get thrilled by the AD 9.
You will have to search in vain for features like tap tempo, modulation and true bypass. The same applies to inputs for an expression- pedal or midi.
But the sound of this 9V-slapback-classic is absolutely convincing.
The production of the AD 9 has been stopped some time ago, but you can still find a used unit in mint condition for a good price.
On my cult-factor-scale, this pink lacquered vintage wonder gets 8 of 10 points.