3 Way Smart Switch by Martin Jerry, 4 Pack, Compatible with Alexa, Smart Home Devices Works with Google Home, 2.4G Wifi, No Hub, Works with Existing 3-Way 4-Way Light Switch

It is my second purchase of this product. The first one was for a set of dimmable switches a year and a half ago. Since they worked great and ease of the app I've decided to get 3-way to keep going. These were easy to install and setup. They perfectly work with the other/old switches. The main thing during the install is to determine which one is the "master" switch in your wiring and this is the one that needs to be replaced with the smart switch. Good stuff.

I am a self professed home automation geek. I like to control all aspects of lights at my home. Turning on/off at right time, or when I leave/enter the house etc.I exclusively buy switches which I can 'locally' control. i.e. not using a third party app or manufacturer servers. It requires little extra elbow grease (opening the switch and installing open source firmware) but in the end I have system which doesn't require dependence on manufacturer servers.I have been buying martin-jerry switches for a long time since they work perfectly for my use case. They use standard ESP8266 wifi chips which can be reprogrammed to work with your home automation software. Few times I had to contact manufacturer for some tech details, and I was surprised that they respond quickly and very supportive of geeks like me. They tool feedback from me and other friends and tried to incorporate in their future products. Given their support and choice of hardware, I give a 5 start to this switch. One side note, some of you may not like the translucent front of switch but it wasn't a big issue for me.