I've been using this for over a year in a classic/modern rock setup.. It doesn't suffer from needing to 'see the guitar' etc. The adjustable Bias and EQ allows you to set to your taste, and depending on your needs it can produce earlier 70s rock nasal wah sounds or more modern with more mid/low tone. I have found that even changing between two same make/model guitars with different output pickups, that having the EQ/Bias options helps a lot. There's a gain adjust inside, and 3-4 dip switches, though I have not had reason to them. I use it mainly after an RC clean boost and before an OD, into a crunch amp (low output humbucker pickups). And the switch is nice and quiet. The only suggestion I would have would be to reposition the power LED. Having a shorter footprint means there's a tendency to block it's view with your foot - and sometimes you need to recheck if it's on or off, but then again that's a sign of how good this pedal is...with other Wahs you wouldn't need to see the LED ot know that they're on... you could hear them by the hiss!