I'm hot and cold on the koko..some days i think it sounds fantastic, other days i think it is imparting something on the tone that i find grating. I'm not into the clean boost side either, that thickens things up too much for me. I think it will be amp dependent.. sounds great with one amp i have and hit or miss with two marshalls believe it or not. I think as those amps are already mid/treb focused, the koko can bring out too much of the annoying higher mids..