In the past 24 hours Microsoft has released Build 15025 – known as the Creators Update to Insiders in the Fast Ring for both desktop and mobile. Installation on 2 different systems went smoothly and performance and stability up to this point are better than expected. Currently am installing on mobile so do not have any experience with the mobile version yet.
Desktop features include Braille support in Narrator, mono audio option in Ease of Access settings, Collections in Feedback Hub, enhanced Night Light features. A long list of improvements can be found at https://blogs.windows.com/windowsexperience/2017/02/01/announcing-windows-10-insider-preview-build-15025-pc/#ZA2ACCbsbBxJ0hmM.97.