Before I purchased the pmp simulator I have tried 2 other simulators which were more expensive but I never found a simulator which provides explaniation for the correct and wront answers in details. This simulator is one of the main reasons I passed the pmp exam from first attempt.
Training for Project Management Professional (PMP)®, PMI Agile Certified Practitioner (PMI-ACP)®, and Certified Associate in Project Management (CAPM)®