As a writer who has been published many times and edited many other writers for publication... It seems like AI can't make stylistic determinations. It is generally good with spelling and grammar but the text it generates is very homogeneous across formats. It's readable but it's not good, and always full of fluff like an online recepie harvesting clicks. It's kind of crap really. If you just need filler it's ok, but if you want something pleasand you definitely still need a human.