What hesitations did you have about working with me?
What results did you achieve since we started working together?
What did you like best about working with me?
How else have you benefitted from our work together?
Would you recommend me and my services? If so, why and to whom?
Is there anything you would've liked to see differently? If so what?
What's the most important thing people should know about working with me?
Is there anything else you'd like to add?
Are you open to having me share your feedback in a testimonial on my website? (You'll be able to review and make edits before anything goes live)