I gave it a fair shake after my team members were raving about it saving time last year, I tried a SFTP function and some Terraform modules and man both of them just didn't work. it did however do a really solid job of explaining some data operation functions I wrote, which I was really happy to see. I do try to add a detail block to my functions and be explicit with typing where appropriate so that probably helped some but yeah, was actually impressed by that. For generation though, maybe it's better now, but I still prefer to pull up the documentation as I spent more time debugging the crap it gave me than piecing together myself.

I'd use a llm tool for interactive documentation and reverse engineering aids though, I personally think that's where it shines, otherwise I'm not sold on the "gen ai will somehow fix all your problems" hype train.