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I had a good experience with 99Papers.com proofreading a research essay, and it might reassure you. The editors didn’t rewrite my voice but significantly improved clarity, grammar, and flow, and the feedback comments were thoughtful. I haven’t seen their internal before/after customer samples, but the changes were obvious and helpful on my own draft. For college app essays, it could be a useful second set of eyes—just ensure your daughter keeps her authentic voice and reviews edits carefully before submission.