Kaplan FL are good exercises, but they aren't good indicators on how you will do on the real MCAT.
Their scoring is WAY off to the real MCAT. On a Kaplan FL, if you get 50% on the PS section, you're scoring like a 9 or a 10. If you get a 50% on a section on the real MCAT, you're scoring like a 6 or 7. It's graded different, so why do people compare??
Kaplan FL, in my opinion, are a waste of time. Do the AAMC test, those are the best. Those are the best indicators of how well you are going to do on the real MCAT.