After completing a paper my supervisor at the time wanted to use a paper review service to review my paper for grammar, English etc..
I am a native English speaker and the service is based in a non-English-speaking country, but I don't know the nationality of the person who reviewed the paper. After receiving back the corrected paper, it seems like they have reduced its size by more than 50% by taking out words phrases that they thought to be redundant and rewording sentences to be easier to understand by anyone.
I feel like these services aren't worth the money but that might just be due to the sour feeling of having someone change the majority of a paper you've spent a fair amount of time on by someone that might know little about the subject.
What kind of experiences have people had with these services? Do you think think they are worth using?