Worked a little bit on a 12 strings with a warped bridge, but still not as I expected. Did not solve my problem, although it made it a little bit better.
The pedal is small and therefore pedalboard-friendly but is still built like a tank. The knobs and switch feel totally quality stuff, the chassis is rock-solid and good looking.
This pedal can be used, just like a Klon Centaur, as a clean boost up to a mild unique sounding overdrive. It gives you plenty of volume and headroom (you generally have to keep the volume knob close to zero if you want to match the bypass volume) and the Gain control is very accurate and allows you to shape your tone just as you desire.
It is a great blues or rock pedal and gives its best if put on top of a tube amp that's almost breaking up but you can still use it, as a regular drive pedal, in front of a clean amp and it's guaranteed to sound better than most of the amplifiers' internal gain stages.
Not a cheap pedal, in line with its main competitors, but definitely worth the price. If you want a Klon-like quality pedal that really gives you the Klon feeling without destroying your wallet, the Archer is a perfect choice.