I've used this service before. I was thinking, "hey, i'll spend 100 bucks and be done with my PS, that's definitely worth it..."
but this was not the case.
considering we've gotten this far i'd say that most of us can write reasonably well. the essayedge helps your essay sound more fluid (adjusts wordiness) and adds transitions where you might lack them. However, the end result is a very AMCA-personal-statement kind of work.
I brought mine to the premed advisor after essayedge and she said that it lacked the "personal" appeal that is so lacking in many of the essays. In the end, i rewrote my PS like i was talking to a friend, and my advisor liked it.
i'd say some people might most def benefit from it, but it's not for everyone.
good luck!!!