Studied 2 weeks; read the PMBOK twice, and did 4 mock exam. I was concerned with the limited time I had to prepare, but the simulator explanation portion quickly improved my understanding of the concepts.
Spent 10 mins wrote down the ITTO and formulas at the beginning of the test(not during demo--it's not allowed); time totally worth spending.
Training for Project Management Professional (PMP)®, PMI Agile Certified Practitioner (PMI-ACP)®, and Certified Associate in Project Management (CAPM)®