Over the last year, I've used the compressor here and there and have found it extremely handy. I've never gone back and redone the wiring. There's a chance that one day I install a Switchpro or something similar, so may wait until then before I start cutting the wires.
The few times I've driven on the trails I've aired down to about 18 psi on my 265/65/18 BFG ATs on Defender steelies. My ARB is just the single unit and not the twin, so it is not the fastest thing out there, but it airs the tires back up fine. My spare is at about 6 psi to fit in the stock location, so the compressor is mandatory if using the spare (only used it for tire rotation so far).
It's pretty slow when I've used it to air up my wife's paddle board. Paddle board is supposed to be at 15 psi. I tried the ARB exclusively once and it took a while, and got pretty hot in the process. Better solution is to use a speed inflator she has that can get it at least full of air (with not much pressure), then use the ARB to get it from about 2 psi up to 15.
Use it often to check air in my wife's and my tires.
Plan on one day installing the emergency kit for the air suspension. ARB will be used for that.