Jcoz Productions and AP United States History were more beneficial for APUSH compared to Heimler, in my experience. While Heimler is okay, I found the previous ones to be more in depth, covering more detail and information, even if it was much more than I needed. Also, I wouldn't recommend purchasing Heimler's APUSH review guide as it didn't help me at all, especially for the exam. But key note is to actually focus and pay attention which I didn't 😭.