I found the content to be pretty spot on, though it really takes some time to really draw out all of the super topics. I sat down and tabulated the subtopics for the PS and BS on excel, there's about 1000. With that being said, your goal isn't to memorize every little detail. Focus on building a solid foundation on each topic, and major sub topics (high yield areas). When you don't understand a main topic it's probably because you don't understand a foundation sub topic. But, always remember that the test is evaluating your critical thinking skills not your raw hard drive for remembering random facts.
Feel free to ignore my links here, but they sort of address that question and then some:
Here's how I felt about the AAMC content for BS/PS on my blog:
http://doctororbust.wordpress.com/2014/02/03/how-i-studied-for-the-mcat/
A very long post on how the feel of the questions of the MCAT are on the PS:
http://doctororbust.wordpress.com/2014/03/09/physical-scien…sage-feel-like/