I've been working on Android for over a year, and I wanted to work on iOS, so I started listening to this, and I think it's a really good lecture. It's really easy to understand because you explain how it works internally with examples. It's really the best!!! I listened to the lectures for a week, except for sleeping and eating, and got about 70% of the course. I'll definitely finish it and get a job as an iOS developer!!! Thank you, Alan, for making such a great lecture.