Ratings and awards, along with feedback, are generally the best indicators as to how dependable a writer is when it comes to completing a specific project.
On a scale from 1 to 5, with 1 being the worst score and 5 the best, writers are awarded with a rating after they have successfully completed a project for a client. Along with this rating, clients post a comment to better describe their experience and explain what was good/bad about working with the writer on their particular task.
This feedback helps other clients identify if a writer is a good fit or not for their particular project. It will let them know, in a general sense, a writer's attributes such as writing ability, expertise in their topic of choice, punctuality, and capability to follow instructions.
Feedback and rating scores are not just exclusive to writers. After a project is complete, a writer will provide a rating - again on a scale from 1 to 5 - and feedback to specify what it was like working with the respective client. The better the rating/feedback, the more a writer can trust that the experience with the client is going to be a good one.