I passed the PMI-ACP all above target. It seemed harder than the PMP, which I just took last month. There were always at least two plausible answers. I was surprised there wasn't a break, so just be ready to go through 120 questions straight through. The PrepCast definitely helped, but I do think the questions were harder on the actual exam. Read each question carefully for keywords that will make you lean to one of the two plausible answers.