I passed my PMP yesterday with three AT and two T.
When I looked at the lessons learned section here and on other sides just before the exam, I was really afraid. A lot of people were making an enormous effort for this exam. Multiple reading of many different books, countless different courses and simulators. I, on the other hand "only" read the Rita book once, read individual sections of the Pmbok and did the 1'400 questions of the PM Simulator. Don't get me wrong. Of course you still have to invest a lot of time. I took 3 months for the preparation and invested maybe 50-80 hours in total.
The Exam Simulator was the best source for me to test and expand my knowledge.
But even the questions are partly similar to the real exam, the real exam is quite different. I would describe the questions as more difficult than in the simulator. The questions on the real exam are much more open and partly unclearly formulated. You will often ask yourself during the exam why an important part of the question is missing. In most cases the solution is hidden in the answers themselves. You must be able to deal with these kinds of questions. Develop strategies such as striking out wrong answers until only 1 or 2 answers are left. Also deals with strategies if you are not able to answer a question so quickly. I left out the question, came back at the end and had enough time to think about the answers. I think this are some of the reasons why people fail despite a lot of knowledge, long preparation and good simulator results.
In the end, it should be said that everyone should do what gives them the most confidence for the exam. But don't let yourself be unsettled by people who are learning extremely much. The exam can also be passed with less effort. But make sure that you understand the key concepts and can handle the type of exam questions.
All the best,
Lukas