I've tried few SEO tools like Frase and Surfer SEO, and this is the best. It does not require anyone to be an SEO expert to use it. It has a very simple editor interface and a small learning curve. Examples of using questions, headers, and keywords to improve content are so helpful that anyone can start optimizing content in no time. It also has an AI writer, which I think is excellent, and content generation quality is the same as most AI writers.
I wish to see NeuronWriter better at providing content based on context and keywords.

Loads of features, ease of use, and lifetime pricing make it a fantastic deal.