Well organized and easy to use. An overview of information. Helpful for getting the big picture but does not cover all the information Im expected to know (Anatomy & Physiology 1&2) Quiz option: This is great and I use it for mini review sessions while on the subway. If you answer incorrectly there is a "Why was it wrong" button. A great idea and usually the explanation is helpful but not always, sometimes it misses the point and doesnt address why your chosen answer was wrong. This button links to extra info that is not in review section and only accessible if you choose the wrong answer, should have option to see it regardless, sometimes a guess is right but youre not sure why! Does not have Lymphatic System, Immune System or Metabolism/Nutrition, all important topics in my A&P class. Like the narration option. Overall a good value, but dont expect it to give you all the details, still I find myself turning to this app more than others when I want to do some easy studying.