The Woods 59007 Decora style 30-15-10-5 minute timer switch is a pretty nice timer switch.
The first time you press the pushbutton switch, the switch turns on, and will turn off after 5 minutes. If you desire for the switch to be on a longer timer, the pushbutton switch can be pressed again to increase the on-time. The second press increases the on-time to 10 minutes. The third press increases the on-time to 15 minutes. The fourth press increases the time to 30 minutes. A fifth press will turn the switch back off.
As the remaining on-time counts down, the LED indicators show the approximate on-time remaining. For example, if the switch is turned on with a 15 minute setting, initially the green 15-minute LED is lit. After being on for 5 minutes, the green 15-minute LED is turned off, and the green 10-minute LED is lit. After 5 more minutes, the green 10-minute LED is turned off, and the green 5-minute LED is lit. After 5 more minutes, the green 5-minute LED is turned off and the red off LED is lit (and the switch output is turned off, turning off whatever the switch is powering).
At any time, the pushbutton switch can be pressed to change the remaining on-time. Each press of the pushbutton moves the on-time setting to the next value in a circular pattern as follows. 5 minute -> 10 minute -> 15 minute -> 30 minute -> off -> 5 minutes -> etc. For instance, if the 5-minute LED is lit, and the pushbutton is pressed twice, the 15 minute LED will be lit instead of the 5 minutes LED, and the switch will remain on for 15 more minutes.
The switch is totally silent except when turning the switch on and when the switch is turned off, at which times you can hear a soft click. I've not disassembled the switch to tell for certain, but it sounds like the switch uses a relay for switching (rather than a triac) to turn its output on and off.
The 30, 15, 10, and 5 minutes LEDs are all green. The off LED is red.
The timings appear to be very accurate. When I tested, the timings seemed to be accurate within 1 second.
The switch plastic has a bit of fine texturing. When I installed it, I think the texturing made it appear very slightly less white than the switch cover around it, but the apparent color difference was not (in my opinion) objectionable.
Here is why I didn't give the switch a 5-star rating: As other reviews have noted, if you just install the switch and screw it into place in the junction box, it sits too low beneath the switch cover to look nice. There is an objectionable (in my opinion) gap around the edge of the switch between the switch and the switch cover. What I did was to put 3 flat washers (number of flat washers determined empirically by trial and error) between the switch and the junction box to shim the switch forward. After doing this, the switch looked nice under the switch cover.
One last quirk with the switch: The directions tell you to wire the switch's green wire to the house wiring's green wire. I've never seen a green wire in house wiring. In the house wiring, the earth wire is pretty much always an uninsulated wire. What they should have said is to connect the switch's green wire to the house wiring's uninsulated wire (or wire with green insulation).
I installed this switch to control a bathroom exhaust fan. After shimming up the switch with flat washers as described above, the switch has worked well and looks nice. I can't comment on the reliability of the switch, as I have only been using it for about a week. I hope that it lasts a long, long time, because I really like this switch. I intend on installing it in two more bathrooms in my house when I add bathroom exhaust fans in those bathrooms.
UPDATE 11/16/2011 - I've been using two of the switches to control bathroom exhaust fans for over a year now. The switches are used several times each day. They continue to work flawlessly. The third has only been in service (also controlling power to a bathroom exhaust fan) for about a month, but based on the performance of the first two, I don't anticipate having any problems with it.