I've looked for a booster for a while and as you know there are many out there. What I was looking for was just a booster with a gain knob, nothing more, nothing less, as I didn't want to colour my signal in any way, but just boost it.
The Katana Mini is small and sturdy and will definitely fit on every pedal board, but is just big enough to be able to stomp on it and not feel like your smashing the pedal under your foot.
When I push the Katana Mini a bit over 12 o'clock you get more crunch and volume, just as my amp would, but also a slight treble boost. If you have a strat or strat-like guitar you probably have enough treble already, so the internal dip switch to cut some treble will be helping you out.
I had heard about Keeley and it's quality before and was already amazed by the packaging and minimalism of the pedal.
All in all it's just what I wanted. 5/5!