The service is very easy to use. Upload your (doc, rtf, or txt) file and in about 24 hours you’ll get your paper returned with edits/comments in the Kibin dashboard. (If you’re in a hurry and need a guarantee that your editing will be done in 24 hours, you can opt to pay the $US0.01 per word, but otherwise the service is free.) You can become a volunteer editor yourself.
In my simple four-paragraph test, the Kibin editor made some helpful suggestions. It’s nice to have another pair of eyes check your writing.