Got my PMP today on the first attempt. I had prepared using the pm exam simulator and highly recommend it. The actual exam questions are not as challenging as those of the simulator. Having said that, the simulator questions have a flavor to them that one gets used to after a few quizzes and the actual exam questions are different in this way. But overall, preparing with simulator and getting 80% or more will make taking the exam much easier. I was done in a little over 2 hours with maybe 10-15 marked questions and that gave me time to revisit them as well as being able to go over the entire exam again. And I did make at least 5 corrections.
The simulator environment is a very good rendition of the actual exam screen so if you have practiced with it, you will go through the tutorial at the exam very quickly.
Great job to the pm simulator team!