As long as it's in free beta, I'll use it sometimes.
Since we got android for switch, I played through Portal 2 on GeForce Now. Got pretty regular lags, but it's mostly not the kind of non-stop action game where that's too much of a problem. It's also now one of my favourite games ever.
Since I mostly want to do my gaming on my switch now, I'm appreciating GeForce Now for the access to more games, and I hope I can tweak things for less lagging.