The reader must sometimes pause or read over to get the meaning. The text does not invite expressive oral reading. Errors tend to be so few and so minor that the reader can easily overlook them unless hunting for them specifically. Paragraphing tends to be sound and to reinforce the organizational structure. Grammar and usage are correct and contribute to clarity and style.
Punctuation is accurate and guides the reader through the text.
Spelling is generally correct, even on more difficult words. The writing is sufficiently long and complex to allow the writer to show skill in using a wide range of conventions. Only light editing would be required to polish the text for publication. Paragraphing is attempted. Paragraphs sometimes run together or begin in the wrong places.