Most probably, you know friends who have used pre-written essays. These are in a better position to advise you on the best services available. Ask them their experience with some of the services you think of contacting. Get views from different friends to determine the most appropriate service for you.
Specialists were needed to copy text and preserve crucial documents during that period. By then, proofreaders and editors were in great demand. The editors were allowed to change the format, and then the interpretation of the work they were handling. This gave them almost absolute control on the work.
Some have opined that students go for these services because they are lazy. This is partly true, but the biggest percentage that goes for these services are students who are trying to beat serious deadlines or have a deficit in their writing skills.
If you seek the services of a custom writing company, you get: Thesis help and Research help; Proofreading and editing help; Help with writing a particular portion of your paper; Write the entire paper; Proper formatting, citations, and references.
In college, a student gets to write too many types of essays. The type of essay writing service you hire must be able to write in good time. If you need an argumentative essay and all they can manage is an expository essay, then they are not the best source of help.