i really only used usmleworld qbank and first aid step 2. don't know how i did, but will let you know. the test seemed ok, though, and i had far fewer questions that i had no idea on...i also used boards and wards as a review, read it throughout the clinicals. lost it a few weeks before the exam, so i switched to FA for my real step 2 studying. i would say it is a decent source, far far better than crush step 2, which was very superficial.