Advantage: True bypass, not expensive, very well made, despite the specific control this sound "has the right to exist".
I had at home, for testing - Metal Zone 2, Fullbore Metal, Metal Core. It seems to me that I like Fangs more, it only lacks a little anger. And Fullbore Metal is also a good option, but it somehow lacks the middle.
Of the minuses, the pedal turns on when you release the button, and turns off when you press ....
(I noticed that if you press/release the power button sharply, there is no difference, it seems that turning the pedal on/off happens the same way)
The pedal has a quiet click, Fullbore clicks louder.
I am still listening and the final conclusion regarding the sound has not been made, I will add to the review later.