Worked for me
I just took my BEC. Having studied using the Wiley books (Study Guides and Problem Sets) was a great help. Although I have not received my score yet, I am pretty sure that I passed. The only drawback (if it is a drawback at all) is that the Wiley books cover WAY more than what the exam tested, at least in my case. I'd rather be over-prepared than under-prepared.