The ACE final certification exam is somewhat difficult compared to other certifications offered by other companies. It doesn't compare to the intensity of the CSCS from NSCA, but it is harder than the personal training certs from the likes of NSCA and NASM. The ACE personal trainer exam pass rate is 65%, which means you are more likely to pass than to fail, but the lower pass rate means you should nail down the information. The test is multiple-choice. It can be a good idea to go with other outside ACE personal trainer study guides and practice exams to ensure the best chance of passing.