I gave this talk at the Swift Developers Community SF Meetup. It discusses how immutable value types can be used in Swift to reduce the complexity of your codebase and avoid common issues in iOS development.
You can find the slides here: http://bit.ly/saferswift
If you have any questions or feedback, feel free to reach out to me.
If you have feedback on this tutorial or find any mistakes, please open issues on the GitHub Repository or comment below.