“Fairly straightforward forward to use, insert between the Pi USB-C connection and the the USB-C power cable, so these are essentially extensions with a built in switch. For standard Pi Projects they are great, I did use 4 of them with a Cloudlet 8x Pi case, being Ok for the Pi(s) nearest the cable slots, but they were slightly too short for the cards further from cable slot (assuming you want the switch outside of the case). I would be interested if a slightly longer version was available, or one that offers (supply) USB to (Pi) USB-C in one cable.”
“It's a power switch to go in between the standard power supply and the Pi itself; it works flawlessly, and saves me pulling the cable out to kill the power. I bought it for my Lakka build, which has a shutdown option, but doesn't kill the power. What's more important is the service; it was delivered next day, and I couldn't be happier.”