Do UIWidgets work well for developing mobile apps in Unity?

I just found out about this package and am going to check it out:

It’s a UI framework for Unity that is based on Flutter, which I find interesting. I was considering Flutter for some mobile game ideas I have, but if this works well I’d much prefer sticking with Unity (my main tool).

Does anyone have experience with UIWidgets and know if it works well? It looks like it was developed by Unity in China, is it used by anyone else?