I didn't take the exam because the test material and practice problems were rife with errors. In fact, the very first two questions were FUBAR (I called someone who was involved with writing it, but can't recall the name, and it was two computers ago, so I don't have the contact info).
Now, that being said, that was seven years ago, so the material is hopefully much better, but I wasn't going to waste my time trying to acheive a FPE in a general engineering state if I could do so more effectively by getting a PE by passing Mechanical.