My personal experience is: - Writing some boilerplate/copy-paste testing code might turn out fine, but I still need to check it and that takes more mental effort than to just copy-paste-adapt with well-known keyboard shortcuts. - Writing business-relevant production code that is readable, maintainable and concise: Forget AI (at least for now).
On good days I try to use and adapt to LLM-generated code, but at the end of the day, when I have to get things done I turn them off: It's easier to reflect and build a complex system without someone constantly "trying" to bullshit you... After all the LLM does not (yet?) know about all the details, the why and all other things that produce something readable, correct and concise.