I've waxed lyrical about the Lehle Sunday Driver before, but have now picked up a second one as I've found it so useful. The difference it makes to the quality of the tone is such that I prefer it to going direct into the amp. It enables instruments to sound like themselves even more than they do direct, and my true bypass pedal run is now completely transparent when in bypass. The ways I'm using it are: - clean to maximise guitar tone to the amp. To my ears my guitar sounds better than guitar-cable-amp has ever sounded. The best way I can describe it is that as well as the tone of the instrument coming through more clearly, playing amplified now has the same feel as it does unamplified. I've always loved the feel from playing resonant electric guitars unamplified, which can get lost through an amp. I can now concentrate more on the playing rather than the gear - dirty clean guitar without any colouration. I have tried all the great transparent overdrives I could find, but they all seemed to take something away from the core tone to my ears. The boost on the Sunday Driver enables a dirty clean by pushing my amp without any colouration, giving the sound I was looking for - as a bass preamp with a passive bass or mic preamp when using the guitar amp as a mini PA, using the boost to match signal levels with clean or overdriven guitar. The Sunday mode also works very well to enable all the detail and some nice additional warmth to come through on both bass and harmonica/vocals through a guitar amp. I know this isn't what the pedal was designed for originally, but it works for me Burkhard makes lots of nice switching gear for which he is known, but this buffer/boost is very much a secret tone weapon for me. To my great surprise, it seems to have ended GAS for other tone enhancers, and my pedalboard is now complete. I guess I'll need to focus more on music now!