Been using earlier betas of Creo and I've followed the development of the product from the early stage. Glad to see it finally hit v 1.0 - a great tool to show non-developers the principles of app development, the wiring of components and intro them to software development before writing some code!
I use Creo every day instead of Xcode. I recommend Creo for advanced and beginners. Creo in his documentation includes tutorials that are useful to start. After that, if there is a problem, the community will help.