Steam remote play together

Hi! Searching for ways to make my game playable online, I’ve find the Steam service “Steam remote play together”?
As the info of the press release, it looks like a nice and easy way to play local co-op games online, but as usual in reality maybe everything is not so pretty.
So, do you know it, or have used it before?

It seems as easy as adding the local multiplayer tag to the game and checking a box in steam.
According to Steam Remote Play (Steamworks Documentation), you will also need to set up a touch controller and to have full controller support to make it work on tv and phone too though.