I have to say I've installed many dimmers, switches, fan controls, and timers. This one was a little confusing at first due to the extra wire. The way to install it is to find the "white" wireset that should be bundled in your gangbox and attach the white wire to that. Then the black wire and red wire go to the two wires that previously went to your wall switch. The green goes to ground, of course.
Once past that, I fiddled a bit with the time, trying to get the light to stay on only 1 minute as I have this in a laundry room between house and garage. I mostly wanted it so a light will come on when I open the door to go inside. The settings are controlled by small rotary dials. So it's hard to be exact. But it's easy to get it good enough.
There's a knob to have it also check ambient light before turning on. If enough light is present, it won't turn on. It comes pre-set so that lighting is ignored and it always comes on.
I couldn't find one of these locally in almond. I bought this product in ivory, which is lighter than the wall plate, but not as white as the white version. Lowes has wall plates similar in color to this unit.
I have it on a circuit with one CFL bulb and it works fine with it. If you read the reviews, other brands seem to have a problem with CFL's.