Which Qbank to use?

With the emergence of USMLERx for Step1, there has been much debate as to which Qbank to use. In Step2, there appears to be much less of a debate: USMLE World, or, as it is lovingly referred to by the masses: "UW". It looks like I'm going to get the one month subscription for $90.00. Yay! More questions, but sadly, less time. No, I don't work for them.