This little switch is an overachiever and amazing value but I gave it 4 out of 5 stars because its hardware feels flimsy and plasticky. If you have high-end hardware on your walls you should think twice about installing these switches. But if you are less picky they are an amazing performer for the price.
PROS: Simple guided installation via mobile app Terrific WiFi connectivity (thanks TP-Link!) Decent mobile app for switch control
CONS: Switch is entirely made of plastic -- looks and feels cheap Not a real rocker switch -- can only be pushed down as an on-off toggle Mobile app is "decent" per above but not great, and certainly not intuitive
I initially bought Leviton switched because of their quality hardware, but their WiFi set-up and ongoing connectivity was terrible, so I had to rip them all out in favor of these Kasa units. I do miss the Leviton solidity, though, and it's too bad that they haven't figured out WiFi.