I have used a few writing services mostly for edits and rewrites and they have come back with grammatical errors, sentences that don't make sense and extra words that don't belong. 1 paper changed all of my instances of recall to review (yes I was writing on product recalls). I had ProPapers complete a PowerPoint presentation with speaker notes and a memo. They were a little bit more expensive than some but well worth it. The PowerPoint was professionally done and I had no edits that needed to be made. I will use ProPapers from now on.
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