I want to thank to Edusum for the experience of the online simulations, is not just a question database to answer, they really know the way that questions are drafted by EC-COUNCIL, it helps to analyse and understand the questions that may not be include in the simulations and appears in the exam. I passed my CCISO certification with 88%. Thank to you Edusum. I have a structured methodologies and hard discpline to study, but this simulator helped me so much.