I actually dont agree with the above posts. I had initially bought the 2013 version and after reading many posts like the those above that were saying to get the newer version, i got scared and bought the 2017 version. Now that I have both, i can tell u that they're practically the same, just the the new one has some extra problems. So like for example, the bio sections of the 2013 one had about 400 questions, whereas the 2017 one had about 600 questions. So all i can tell u is that if ur on a budget, i think u can still buy the older version and be confident u have the resources u need to succeed. I wish someone had told me that... Good luck!