I guess I'm in the mood for another booster unit, this time it's the Raspberry Booster by One Control. Dimensions-wise, it's definitely in the mini pedal league without being feeble in terms of weight & construction. I love the fact that the pedal in question features both level (Master) & gain control. These are the details that add to drive differently in terms of definition but keep in mind that it's a booster unit. Any high expectations in terms of drive responses should be kept in check. That Z knob is simply a presence control & affects your tone quite markedly if you're the type who keeps varying your guitar's volume control every now & then. For high gain dweebs like me, it adds hair to tone, simply put, you'd hear a touch more top end in the mix.