Airstep Kat Edition : Utterly transformational, not very aesthetically pleasing

As a footswitch it completely transforms the functionality of your Boss Katana. The bluetooth connectivity is so good that I have literally never used the knobs on the top other than the power attenuator and the master volume, everything else I do using my laptop or my phone. Two minor issues: first, the USB cable is a bit flimsy and only 2m long, so whilst in the bedroom or practice space this isn't a problem, I've bought a more rugged 5m long replacement from Amazon for band rehearsals and live performances. Second, the unit is just a bit ugly and cheap, and I'm not sure how long the USB connection will last. A minor issue, but worth noting. Nonetheless, more or less a mandatory expansion in my view.