Recently took it. I felt the free Qs represented some of the exam by length and difficulty, and some it didnt (ie) the free Qs are pretty straight forward and the question length varies, just like the real exam can. Any of these tests only assess ur knowledge base, as its only half of the real exam, except the free Qs. So only use them as such. I did all the nbmes, the free Qs, and had NO repeats. However it is the same concepts and ideas so i felt comfortable during the entire exam. Just study world and whatever review book youre editing ur golden