Considering there really isn't much else out there this is almost a must-have for FE candidates. However, I found that there were many repetitive questions and that they are relatively simple. The pictures a good, for the most part and there are LOTS of questions.
I thought it was pretty lame that even if you pay for the book you have to pay them again to give you the CEs - haha. It seems like there should be a simple way to do that online instead of mailing them things.