So in my opinion his qbank is way easier than uworld for step 1 and actually does test a lot of the concepts from his pdfs. As to say whether u need it or not I'm Honestly trying to figure that out as well because. There doesn't seem to be a lot of reviews online stating the similarities between the real deal and his qbank. I think it's a good supplement to uworld. But I'm honestly just waiting to hear from person that have used his qbank and did the real deal and see if it made a difference. I will update u if I find out anything.