LSAT? Princeton Review or Powerscore? Wait, then there is Kaplan? Help!?

Who is the best of the best? I have researched it myself, but I would really like to see some actual results of testers. I want a lot of private tutoring and if I am going to spend 7K on preparation, I want to be sure that its the best of the best. Has anyone taken the LSAT before? Has anyone taken a prep course? I am open to any and all information you can suggest! :)