I wasn't sure if my essay really needed another edit, but when I saw the changes my editor made, I was so happy I had decided to try it out!
Thank you very much for your editing. I especially appreciated your comments and critique. Your editing made my essay much more succinct and clear, and your critique helped me learn the weaknesses of my writing, which will help me in the future.
Brilliant job. You really took the junk that I wrote and polished it into a piece of gold! Thank you so much.