I A/B pedals VERY QUICK. Got this in today. I was looking for something smaller than my q tron and ran off 9v. This pedal does that. And man does it nail the q tron sound much better than anything I have tried yet. I recommend this 100x over the mxr m82 which is bandpass. I'm asking 140$ shipped you can't tell it's used, comes with the bag they all come in. Nearly identical to the q tron without the volume spike. I'm trying the wonderlove next.