I chose this site to prepare for C1000-010 because it gives the candidates an edge that is must required to clear the certification exam in first attempt. The site helped me practice online mock tests like the actual C1000-010. I was able to perform different tests that contained more than 150 scenario based questions. The catch was to complete the test within 90 minutes and that built up a simulated environment. I was not aware that syllabus weight. But edusum.com made sure that the practice exams are designed on the basis of this syllabus weight. This site is very helpful and very good for ibm exams.