Yeah. I also use it when I travel to Canada, Ecuador, Colombia and México, and it just works. I'm telling you, it's been a life saver because the roaming fees from my country's providers are ridiculously high.
I've been expecting Google to kill it like they tend to do with everything people start to like, but it's been over 7 years already, and still going.
I have no idea what the impact would be with LOS, but with GrapheneOS, I don't even get error messages. Granted, I did use play services while setting up the Fi app, then un-installed it all and update from Aurora. Flawless.