WebIDE still feels like a toy for now. Very little customization for the text editor for now. Also the browser has a shiny new dark theme but the text editor doesn't seem to support themes (and has a light theme as default).
I have been using it for a few weeks, and I find it extremely useful. Not the editor itself (I'm currently test-driving Atom), but the ability to quickly send my app to all my devices and emulators, and remote debug it.
