USMLE Prep
The Northwestern Medical Review USMLE Prep is a great resource for the types of questions encountered on the licensing exam. I was mainly interested in the Physiology section but did get a chance to examine the other topic areas. The questions were all clinical based vignettes and covered all topics. They ranged from 1 - 2 sentence basic questions to complex clinical scenarios. Questions were well written and directed the user to the answer with good distractions (alternatives were not so outrageous that you knew they were wrong). I think the best part, though, was the fact that each question had explanations as to why the given answer was correct.