I have the Harmony hub, in-wall GE Z-Wave Smart Dimmer switches (12724), and a SmartThings hub. I control my TV (just on/off activities) with the Amazon Echo through IFTTT, using the Amazon Alexa and Harmony channels. I control the light switches through SmartThings (once you add them to SmartThings, you just ask the Echo to discover them). I also have some Hue lights, which have direct integration with the Echo. If you don't care about changing the color of the lights, I think the GE light switches are great. I have 12 of them throughout the house and haven't had any issues with them.