Darius is an absolutely outstanding instructor and mentor throughout the CPA exam process. Most CPA exam materials, be it Becker or another software, have a classic flaw in this 21st-century era of exam preparation in that they lack an active learning process in which a student can ask questions to a real human being and understand why a concept or idea is wrong. Darius takes complex sections of the exam, makes them easier to understand, and focuses you on what you really need to know. Darius helped me to pass all 4 parts of the CPA exam within 18 months, and was worth every penny as it would not have been possible otherwise.