The best looking smart switches on the market. The glass finish is amazing. I have installed these switches all around the house.
For 2 way switching, you will need to use the app (plenty of videos on youtube) but once set up and you physically press it, you don't need the app. Love the automation. i have my front lights, kitchen and dinning room light turn on as soon as i get home. You do need to keep the smart life app open on your phone for the automation to work. You must have the Neutral (black) wire, especially in your stair case (i didn't have it there in my two story home)