Even if you think you know what you're doing, this is a fantastic way to systemize your studying

I generally do test well, but my first blind GMAT really showed how different the test is from what I was used to. The Manhattan course was really helpful in getting familiar with they types of questions and the strategies for approaching them. And after a few weeks and a few practice tests, the individual sessions that come free with the course were extremely helpful in taking an honest evaluation of where I was in my studying process and where to focus the rest of my time before test day to maximize the outcome. The diagnostic reports that come with the practice tests are super helpful in pinpointing the specific areas to focus on.