Sounds pretty good to me !
p.s. the audio on the youtube video is not a demo of the box (just me goofin around)
Is this effect box version 0 or 1 of the Black Finger ?
The common older one has a finger graphic on the box.
I have found one other photo of it – see link …
http://www.effectsdatabase.com/model/eh/blackfinger

cheers !