I agree with DDSMS10, QBankDMD was a complete waste of my money. The questions were just plain bad. They were not specific, overly broad, and generally useless. Of the questions that were reasonable, there were errors in the answers and/or explanation. I only used it for 3 days before I was fed up and stopped completely. I ended up just reading through Mosby's once and I passed NBDE Part2 no problem.