I had the beta as well and have been using it quite a bit. I like the concept a lot. This is exactly how I want to be using AI for writing purposes. Overall, it’s whatever content I want to write in, but then I can ask it, “Hey, help me improve this line,” or “Fix this paragraph,” piecemeal.

That said, it only worked for me maybe 70% of the time. It would either have trouble finding things, or it would just arbitrarily rewrite the entire document, even when it was supposed to be focused on a certain part of it.