I went to a presentation by a similar company.. I thought it was totally not worth the money. What is it about the application process you are nervous about?
Writing the personal statement/2ndary essays? - ask an SDN reader, doctors you've shadowed, professors you've worked for, med school friends
doing the interview? - your university career center will help you with this for FREE. my alma mater offers services for students upto a year after graduation - yours might be similar. you usually give them your application materials, tell them which schools you are applying to (states vs. canada) and they will do a mock interview with you, give you feedback. plus, you can always practice with family/friends/mentors.
honestly, i think SDN is a much better (AND CHEAPER) resource. But if you have the money, why not? I'd be more inclined to spend it on a nice bottle of wine, though. 😉