Just a warning to everyone out there who would be interested in using the professional editing service gradually.me: don't. They are cheap but the price is not worth the quality. I sent them a draft of my SOP and resume recently. The comments for the first round of edits were not insightful and basic. Basically anyone who has passed high school English could have provided them. Furthermore their lack of professionalism and response to e-mails is lacking, by which I mean doesn't really happen.
A few of my peers have had several experiences and we would all recommend Essay Edge.
Sorry for the rant, but I felt strongly enough about this to share with others.