I like this a lot. It's immediately giving me a selection of alternative options, many of which are better than what I wrote. When the suggested options suck it often seems better to delete that fragment entirely. For zero effort it gives me prompts that help constructively question exactly what it is that I'm trying to say. And that bring to mind concrete ideas for communicating more effectively.

Privacy is a serious concern. I don't feel great handing my thoughts to a third party for analysis. If I could pay anonymously I'd feel a lot better about that.

Pricing is also a concern. "Sign up now for a 30-day free trial. Once your trial is over, we'll work with you to set up a subscription plan that works for you and your business."

Seems like the plan is to analyze what I'm submitting and judge what I'm worth. I'd be more likely to purchase with transparent pricing. Otherwise I'm thinking it's better to query this in a privacy preserving way with repeated free trials.