I have that same one in an RV7 which I bought already built. It works fine, has lots of outputs with faston terminals. Very easy to wire up a new circuit. You can use the master relay and switch already built in, or bypass it if you are doing huge electrical loads for some reason. It also already has the avionics switch built in, with separate circuits for avionics. Taxi and Landing light separate switches, Strobes, lights, alternator, and aux switches, I recall.

Another plus is that you can use it as a complete box with the switches exposed to the panel as one side of the box, or separate the switches physically and bury the box deeper back.

Also, when a short stops the current, there is a tiny amount of juice that can tell if the short has been removed, and it automatically resets........so no looking for fuses like my Kitfox! Then again, with a Kitfox you won't have need for so many circuits possibly.

I'd say look at the dimensions and figure which way you want to mount it first. Installation info:
EXPBUS II | Aircraft Spruce