I found the Reza Course to be nearly useless, aside from the practice problems and practice test. If you attend the lecture, I highly recommend doing the problem sets BEFORE the class, and following along to ensure you understand the problems a second time. Reza isn't that great at explaining the material, but if you understand the problems beforehand, it will help with comprehending his lectures. Then do the problems a SECOND time, before doing the practice exam.
From what I hear, the CPESR course is the most refined, and the EET practice exams are the most useful. Mansour seems to get a lot of critique in poor quality.