I also took the School of PE. 5 Weeks or so of class (mon-thurs - 3 hours a night via internet). I had moved from doing real engineering, to PM, to managment so I was a bit rusty. I only took the MERM, sample probs (which I didn't need), notes from class (which I didn't use), Keenan steam tables (keeps from interpolating so saves time), and Crane TP 410. I finished the morning an hour early and the afternoon 30 minutes early and walked out confident. I worked problems on one day each weekend during the class for about 3-4 hours. Probably, not the best study technique, but it worked.
Overall, school of PE is good. They have some great instructors and some that are not as well versed in all topics (the one I am thinking of completely redeemed himself when we got to obviously his area of expertise). I have recommended it to everyone in my office as a relatively quick way to study and not waste alot of time. The cost of the class is small compared to the time I hear alot of people studying (6 months) versus what i actually studied.