About a week ago, I set it up on my windows machine (host) to my ubuntu laptop (client) with the help of an LLM in about 30 minutes, with an additional 15 of troubleshooting the first time I tried using it away from the LAN. It was pretty painless and worked right off the bat. And then it turned out that A) the game my friend and I were trying to play had only local multiplayer (so my host machine couldn't connect) and B) despite protonDB claiming limited compatibility, the game launched immediately with no problems natively on my laptop, so the whole exercise ended up not being necessary. But it was relatively painless.

In case it makes a difference, I was also using Tailscale.

I guess it's easier when it's pc to pc although it's cool that you can do it from Windows to Ubuntu. But I always understood the main reason was to be able to do it to a portable device so that you'd use your phone as a mini steamdeck basically but via streaming from a pc.

I was quite excited by that, I even got a controller that could clamp on to the phone. Just couldn't get it to work reliably.