There is nothing complicated the pedals. Manual useless.
So yaa say s it.
For the distortion, well it's the BOSS.
Mine (bought used) is a Japan, so the distortion is not too bad, although relatively mtallique by snoring and cons ca ca ds breath a lot to be pushed a little bit And that's trsdsagrable.
I especially bought for the feedback, which is good trs. With the possibility of adding more or less harmonic feedback, your exact trs is satisfactory. Moreover, the distortion I always leave 0 and I only use the feedback.
With Pitch-Shifter or trmolo derrire (gender PS-5) can be really funny stuff. (Except to do a bit of balance because it was one on each foot pedals).
Basically, the note is primarily for the feedback, not for the distortion.
Feedback is an effect may rpandu version pedals. Besides this MODEL is no longer produced and has not emerged from BOSS equivalent.
So no regrets for having bought it does not use it every day from this type of effect, but you can place it in a solo from time to time, the effects vary ca.
CAUTION: There were DF-2 Taiwanese significantly worse than the Japanese-made, be careful when you achte one occasion.