I've found it's best for things you kinda already know the answer to or at least know what it should look like, it fills in the blanks
Also, for gpt 4 you can get it without the subscription if you do it through the API and use something like gpt-cli (you're still paying for it but unless you're talking to it hours on end it'll end up cheaper that way)
Given how much of a fluke it was someone found it it makes you wonder what else is hiding in some core component of our systems