They repeat a lot of passages that you've either seen in previous tests, or on your lessons/hmwk practicing. This can completely throw off the accuracy of your timing, etc if for instance you've seen a verbal passage before. Also they are, in general, just confidence killers. Most people see a lot of grade deflation in these FLs. Esp 10 and 11. I'd just say away. After FL6 move onto AAMC 3 and start adjusting to the different style.