Seems like this is the only way to run your fog lights independently of the headlights, and I wanted to run my fogs with my high beams to get better side lighting without mounting ditch lights on the hood. With upgraded Diode Dynamics SS3 Pro fogs, it really does the trick and keeps it looking totally stock.
One of my concerns was that the switch on the headlight stalk wouldn't work anymore, but when the BriteBox switch is off, the fogs and headlights work as usual. With the switch on, all combinations are possible: fogs only, fogs/low beams, and fogs/low/high beams. Only possible drawback is when the BriteBox switch is on, it's possible to leave your fogs on after leaving the car, and they don't shut off automatically. But with my upgraded fogs, it would be hard not to notice they're on.
There are some options on YouTube for wiring it so that the BriteBox also turns off with the key, but I didn't want to start bending tabs in my fuse box. Maybe after I leave the fogs on and drain the battery...
Really nice wiring harness. I got the OEM switch, and wiring was a breeze.