Did anyone in your class use USMLE World or USMLE Rx (I was playing with their on-line demo which was a lot like the practice Qs on the USBME site)? I know some people swear by either Q Bank or USMLE World, but USMLE Rx is definitely cheaper. Does it really matter as long as your are doing questions?
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I used the Kaplan Qbank, and there are MORE THAN ENOUGH questions there. It seemed like most of my classmates subscribed to Kaplan as well and I didn't hear any complaints about the program. The questions are good and have detailed and well-written answers with explanations of why the correct answer IS correct and why the others are not.
Toward the end of my studying I sampled a bunch of USMLEworld questions and found that their questions were also very good. Personally I feel that both question banks are about the same and will prepare you equally well for the Boards. The structure of the questions are slightly different (I think the Kaplan questions have slightly longer question stems and are more story-like but I can't really remember now) but overall content is the same. Another thing I liked about USMLEWorld is that in the explanations they go through the correct and incorrect answer choices, and then at the bottom they also include a summary of the take-home message so that if you're just skimming answers you can scroll down and just read that. The major plus of USMLEworld is that the actual format of the program is EXACTLY like that of the actual Step1. As in, the font, coloration, layout, etc of the USMLEworld looks exactly like what appears on the computer monitor in the Prometric test center on test day. So if you want to simulate an accurate testing environment, go for the U-World.
Robbins Pathology also has a question book that comes highly recommended by students if you're weak in pathology.
I have not heard anything about USMLE Rx, sorry!
And bottom lineā¦DO AS MANY QUESTIONS AS POSSIBLE! It does not matter which QBank you choose, as long as you're doing questions!