I passed my CNRN on July 30th, 2013. I would recommend to EVERYONE to use the CNRN review course provided by Gannett education. It is called the Intensive CE series preparation for the CNRN exam, registered via AANN. I took both this review course, and the one provided by Mo-Metrix media. The Mo-Metrix review had only 1/10 of the information provided by Gannett's education. I would recommend the Gannett's review ONLY to everyone if they want to pass the CNRN. It is a very difficult exam, but this review course made a big difference for me. Most of the topics on the exam were not even part of the mo-Metrix review.