I took the test yesterday. I studied using First Aid, UWorld, and DIT. I really felt I knew the material covered by those resources pretty well and felt confident going into the real deal. I took NBME 13 Friday and made a 240. Well, the actual test was awful. There were many questions where I absolutely had no clue and had never seen the information presented in the question. My initial impression is that First Aid, UWorld, and DIT didn't really prepare me very well for the test I was given. What could I have done differently? Besides reading obscure research papers I really have no idea. I'd also add that the questions asked weren't difficult questions because they required critical thinking skills. The questions were pretty straight forward, but they presented facts that I had never seen before in any review materials. This is by no means meant to scare anyone. Like someone else mentioned previously, everyone pretty much uses the same study materials so if you get a question you've never seen before odds are almost no one else has seen it either. Keep working hard and you'll be fine.