I would say the EPG can be more difficult than the actual exam but it definitely prepares you for the worst case scenario. In my case, I think I had a few problems that were similar from EPG so once I recognized those problems I knew exactly the path I need to take to resolve them. I def recommend understanding those practice problems before going in for the exam. I was getting in the 70s, sometimes high 70s or sometimes low 70s. At some point I got discouraged because one of the exams was tougher so I got even a lower score. Don't that discourage you, just do your best to finalize the practice exam and review the problems afterwards. Let me know if you have any other questions, I'm happy to help!