I wanna know this too, I took the NBME basic sciences shelf and didn't score too great (64%) which correlates to like a 185 on step 1. I didn't study for it at all though, so I was just happy knowing that I could pass (albeit by 3 points) if I didn't do anything from the end of M2 year until exam day. I don't think anyone took that exam seriously as it didn't reflect on any of our grades it was merely administered for our own evaluation purposes. Our class average was 60% which was failing, but a few people just came in wrote their name on the scantron and handed in a blank scantron so that's what probably contributed to that. Anyway, how does this compare to the level of difficulty of step 1? What about qbank? I've heard mixed things, but if someone who has already taken step 1 fairly recently could shed some light on this that would be awesome.