Just took step 1 yesterday and I gotta say it wasn't so bad. I got at least 2 really easy questions wrong which is still bothering me uggghhh. But overall I thought Uworld was harder. There were some #$# questions where i had no idea what was going on and just didn't even spend time on and guessed in 3 seconds and there were some questions that were super easy that i answered in the same amount of time. I think the NBME make the exam quite fair for the most part.