i would NOT recommend essay edge if you are a good writer. i graduated with an english major, but was paranoid about my PS and wanted it to be perfect. for the price it costs to have someone edit your essay, this person made almost NO changes to my PS. when i questioned her, she said that there wasn't anything wrong with it. she would change a word here and there, but i wanted someone to really break apart my PS and suggest better themes, ways to tie things together, possible alternate structuring...really meaty stuff. after i had read the before and after essays on the website, i was convinced that they did such good work that i spent money to have someone do what a friend could do for free.
my suggestion is that for someone who has poor writing abilities or who has not spent the better part of their undergrad years writing essays, this could be helpful. for anyone else, it seems like a waste of money.
hope this was helpful!