IMHO, AI can spot errors in an instant when I give it the files. This can be a real time-saver. I also use it as a glorified autocomplete, it's amazingly good at converting programming code in a mechanical fashion, like adding some lines in every function or changing some API.

The problem is that it can give very bad general advise in more complex cases, and it seems to be especially clueless about software architecture. I need to learn to force myself to ignore AI advice when my initial reaction is "Hm, I don't know." It seems that my bullshit detector is better than any AI so far even if I know the topic less good.