“I can turn my Pi's off and on without taking the cable out. Much more convenient for my setup where my raspberry devices aren't easily accessible and prevents wear and tare on the USB port.”
“Got 3 for my jukeboxs.work well and the red led tells you it powered on, useful as 2 of my setups are headless and you can't see the leds on the pi. Good feel to the switch.”
“This is much more convenient than unplugging the power supply from the mains. The only slight drawback is that the connector can loosen and effectively turn off if the wires are jostled. I rebooted the pi inadvertently this way three times.”