1.So far, it is great if you know what you want, and tell it exactly how you want it, and AI can help you on that (basically intern level work).

2. When you are in a new area, but you don't want to dive deep and just want something quick and it is not core of the app/service.

But, if you are experienced, you can see how AI can mess things up pretty quickly, hence for me it has been best used to 'fill in clear and well defined functionality' at peacemeal. Basically it is best for small bites, then large chunks.