It all depends. If you are strong in content, then take Kaplan. Their questions are harder and really get you to think critically. If you are not the strongest in content, Hurst might be better. Regardless, you can always look up what it is that you do not know. Review the rationales and continue to do Qs. Then take tests of all the Qs you answered incorrectly. In 3 weeks, I answered about 5000 Qs btw finishing both ATI and Kaplan. I passed in 75. A friend of mind did Hurst and ATI and he also passed in the minimum.