I have a newborn so didn't get to study near as much as I wanted. It's more in-depth medical than CCRN. It was heavy on hemodynamics, shock, ACS, CHF, pacers; and all the meds/assessment/interventions for all. The biggest difference for me between the CCRN and CMC was the style of the questions. CCRN was straightforward ie if the answer was hypokalemia they would give hypo/hyper K and hypo/hyper Na as your answer choices, more knowledge based question. The CMC was more NCLEX-y-'What's your initial action','what's your priority?'. So while it was slightly more in-depth, the difficulty of the question was increased. There were MANY times where I fought between 2 answers. I honestly don't think if I studied harder/longer or even less if it would have changed my score. Resources I used: all my CCRN study materials, Pass CCRN (CD only), and the $10 CMC AACN review question.