ApplicantLab is a great resource for those willing to put in the work independently, with some level of guidance given through instructional videos and comments. As someone who likes to work/study independently (I studied for the GMAT on my own) this service was just what I was looking for!
Maria is super passionate about this project and her students and goes above and beyond in answering any questions. Her videos are very informative and have all the information required for you to write a good essay and put your best foot forward.
ApplicantLab is also very affordable. I had friends who hired private consultants for 5x the price. I highly recommend ApplicantLab.