• "I found the Concept Checkers very helpful and they actually helped me pass the exam."

    Pradeep R., Pakistan
  • "The original ERP readings are vast and scattered, and the Concept Checkers helped me structure them much better."

    Oliver S., Riga/Latvia
  • "The question-answer format of Vivera has proven very effective in my exam prep. I can highly recommend this product."

    Arthur M., San Francisco/USA
  • "At the beginning, the original readings and academic papers were absolutely overwhelming. The Concept Checkers really helped me make sense of the welter of information and pass the exam in the first go."

    Simon F., Zurich/Switzerland
  • "My main challenge was organizing the material, and the Concept Checkers did an excellent job at helping me with that."

    Aida P., Chennai/India
  • "It's just so much easier to practice for the exam with the Concept Checkers, especially as there is a real shortage of practice exams out there."

    John S., Johannesburg/South Africa