I have shipped two small projects using Godot 3. It's a cool engine but to me it can improve on the following points to be considered a mature engine for a new indie project: * GDscript is cool but lacks features such as better typing and lambdas over generic nodes. * I have encountered many bugs in the Engine more than when I was using GameMaker. * It lacks native mobile monetization.

Other than that I'm much more enjoying working with Godot than Unity.