Is there anyone who took TESTMASTERS before?

Hi folks,

             I have taken the TESTMASTERS LSAT prep for the Oct. 4th test. Last night was the first class for the prep, we did a diagnostic test. I have one question here, is anyone who took the same class before? I don't know whether I follow the teacher's instruction and do the homework is enough for me to do the practice. Also, the other reference books, such as powerscore... Do I still need to take a look at them? I think the class materials are enough, but I hope someone can tell me their own experiences. Thanks and have a great night!