Two things we won't do to your manuscript
Editing goes wrong in predictable ways. These are the two we're strict about.
We won't rewrite you into someone else
The test of a good line edit is that it sounds more like you afterwards, not more like the editor. If a sentence works, it stays, even when another phrasing was available. Every change comes back tracked so you can see it and reject it.
We won't edit against your genre
Thrillers and academic books follow different rules on tense, dialogue tags and paragraph length. Edit without knowing the genre and you get clean prose that reads wrong to the exact readers who were going to buy it.