I have not used it enough to tell. I asked it to make a one-shot for me. It set up the entire plot, created the stat blocks for the monsters, set up the encounters. Created the traps and the puzzles. It even made the magic items, along with detailed descriptions and lore. I’ve had it help with making a custom setting, including custom races and classes. It’s not copy/paste perfect of course, but good enough of a framework that I can easily go in and tweak stuff. Definitely saves hours of work.