Accuracy of AAMC's free MCAT 3 test?

The practice tests that I’ve taken are supposedly not close to what the real test is like. I ordered all the practice tests and I am taking one a week until the real test. I am also reviewing more than one test prep to prepare. Because repetition is key, I have started with one test prep, and will go through the others. I found taking the Princeton Review course interesting, but not that helpful. I should have just studied on my own instead of going to the MCAT prep lectures.