What types of customers have you worked with?
Dissertations, articles for academic publication, coaching (especially for ADHD academics and minority clients who have additional hoops to jump through). Also creative writing -- novels, short stories, essays, poetry. I have an online support group (text discussion and voice meetings via internet 1x week) for ADHD clients and will be adding a general support group as well as a minority achievement group.
What advice would you give a customer looking to hire a provider in your area of work?
Giant companies that provide services similar to mine will not give you the personalized service nor the attention to the psychology of writing that will help you do so much better in the future. You will have much more flexibility -- I prefer to work a chapter or several chapters at a time rather than waiting for all chapters to be completed.