Gleim Review System was my primary source of information during my preparation for the CIA exams. I’ve made a choice based on feedback of those who had some experience with different providers, so it wasn’t completely blind, and I’m sure that Gleim Review System was the right choice. . The materials are well structured, easy to understand, and cover all major areas. I’ve passed all three exams within a year and from the first attempt. I felt surprised every time when I found out that I have passed my exam. I studied hard, but at the exam it was difficult anyway. I wouldn’t change the way I have studied as it led me to the successful result.