I took the PTO exam -- it was the epitome of the proverbial hoop that has to be jumped through. Most of the questions are poorly written and have little to do with practice. Indeed, when I took the Kayton course to prepare, Mr. Kayton said there was one exam where 28% of the questions were flawed in that there was either two correct answers, three correct answers or no correct answers. Well, in an open book exam with time constraints, its pretty disconcerning to try to pick the right answer when there is actually two or three right answers.