I checked. THey are useful for exam review. The o
pinion is: if you have good notes from your reading (or study group), and take solid notes during the lectures, you can get by without the study guides. A suggestion was to simply split the cost with a study group, and then it gets loaned out to a person if they ask, main use would be if you are having a hard time with a particular topic and simply eed extra questions on the topics.
I may go ahead and get the major ones to share out with whoever I study with, and because I do not want to let things get away from me - this is a major change of career for me, and probably the last time I will make such a major change, so I want to nail this.