Shaula is a professional and highly competent editor. I send everything I write to her, be it chapters of my novel, posts to my blog and even sometimes verbose emails. Her attention to detail is astounding and she not only proofreads exceptionally well, she also focuses on content and readability. She poses questions and comments on the things that work and the things that don't.
Having a vast knowledge of literature and books, this makes her an excellent source to also bounce ideas of of, if one is worried about flow or plot problems. She can think it through and give her feedback.
Shaula is more than just a proofreader, she's an editor. And she's the best one I've ever used!