I took some pics as I installed it, but somehow either my iPhone or my computer ended up eating up half of 'em, so I didn't have enough snaps to do a really satisfying install thread.
I've got the 4 banger, so I mounted the compressor on the driver side fender, right behind the fuse box, using some thick rubber washers and grommets to provide some vibration isolation between the compressor and the body.
I had to have ARB USA send me two separate parts - the air solenoid for the locker didn't hold pressure, and the Y valve for the add-on tire inflation kit was improperly threaded.
As a result, my locker works, but I still haven't gotten around to installing the Y valve and tire inflation kit. So I can't really report on how well it works for airing up tires.
My expectation is it'll be just roughly about as fast as my VIAIR 400 - around 3 minutes a tire or a little less (285/70R17.)
It wasn't easy to find a good switched power line behind the dash - I used the most current wiring diagram off of toyotaowners.com ($15 fee for two days of access.)
My most convenient power source was a tiny 22ga wire, so I brought in an unswitched power line from the battery and added a little solenoid there, behind the dash, and hooked the output of the solenoid as my "switched" power into the ARB air harness. That's probably total overkill, but I've had aftermarket stereo electronics fry a car computer before, and so I'm super paranoid about the whole thing.
The dash lighting wiring doesn't work exactly the same as ARB's harness expects (they expect variable input voltage to ground) so if you want to wire up the lights with variable lighting levels, you have to do a tiny bit more work (wire into both a positive source and negative return, not just a positive source and then to ground.)
Now, I *HATE* cutting factory wires, so after waffling for a while and I eventually decided I'd rather have unlit buttons than make necessary two additional cuts and crimps.
On the tacoma "basic" model, there are three empty switch blanks right where things like factory Locker and atrac switches would go, so those made a great place to put the ARB compressor and locker switches.
Anyhow, since then, ARB has now introduced an even newer continuous duty air compressor, so you'll want to check that one out as well.