One of the most useful things about SDN are volunteer readers and having just each other to exchange essays. Having someone read your essays who does not know you but has a some idea of what premeds should have, like another premed, is similar to how an adcom will see you. Do not rely on people who know you well to criticize your essay, especially parents, as they will see you in a far too optomistic light. Seek out professors, both those that know you well and those that dont. Dont hesitate in asking an English or social science professor who you had a class with 2 years before to please review your essay especially near final drafts, They will be both great proof readers has well as evaluate the story you are trying to tell. If it clear enough for these non-med school profs to get it, it will be more than clear to a adcom. No matter how much you have in the way of grades, scores, EC, etc, a well-written, highly polished narrative linking your motivation, commitment and achievement into coherent, concise and compelling themes/patterns, across PS, EC, and secondary can really push you up in the stack