I have used my company LLM thingy. Able to summarize and document code leveraging remarks and general code behavior just because LLM just ingested the full python docs.
About generating things well... it just copypastes the same snippets you could find on stackoverflow, including bugs - if the task you throw at it has already been answered.
For complete and complex code... well it spews out the same useless advice you could get from a drunk non expert person while sitting at the bar.
Issue is... LLMs are too big to fail, everyone just poured billions in this huge statistics bean counter, and... someone has to justify those expenses at board meetings.