It works relatively well, and actually better than in Unity (which use an older C# version), but unfortunately it does not work everywhere. For example, it's not possible to export to the web, which was to me the main show stopper. I needed C# due to some libraries, and I needed that it runs in a browser, so that was game over, no pun intended.
Apart from that, I really preferred Godot over Unity. Faster, more consistent, better learning curve, etc.
Are you sure it can't export c# to web? I would have assumed that as true but Godot's documentation does not list that as a limitation, and in fact offers c# code on how to use the JavaScript interop, something that would be pretty meaningless without support.
> Note that as of this release projects made with C# still cannot be exported to mobile and web platforms. We are working on providing the support as soon as possible, but the resolution of this limitation will likely depend on the release of .NET 8 at the end of 2023. This means that the work on enabling mobile and web platforms can only truly start later this year.
Apart from that, I really preferred Godot over Unity. Faster, more consistent, better learning curve, etc.