I passed the PMI-ACP exam last week with 'Above Target' results.
I purchased PMI-ACP exam simulator provided by Cornelius Fichtner and it was very helpful
I took the two day exam prep somewhere else and it was not helping me much and then I saw OSP International's PMI-exam simulator and tried the sample of PM-Prepcast and exam simulator.
The prepcast was really good but then I already took the training and I was looking for only the practice exams, so I purchased that. I also bought PMI-ACP exam prep book by Mike Griffith and through that I was able to understand the concept and how to develop the 'Agile Mindset' ... both the simulator and the book helped me get through the exam in the first attempt. Also I am very confident to continue as Agile Practitioner.