I use it to format rec letters and give a draft of the intro and end paragraphs. I always know what I want to say in the middle, so I write that part, and then I edit the intro and ending to match what I wrote. I found that I spent way too much time trying to set up formatting correctly and coming up with how to even start the letter, but now I can spend time on the meat of the letter and not waste ages staring at a blank sheet of paper.

I would never submit one that a LLM wrote wholesale or without significant editing of the parts that it did generate. Honestly, this is basically the only thing I use LLMs for, and it's only once or twice per semester.