I found the TM weekend class to be a good value. Its relatively cheap, gives you the information you need and only takes 2 days, then its up to you to put in the time taking practice exams(and I might add you can't do enough of this, especially take practice exams under timed conditions.
I feel like I'm the only person on this board who will say they liked Kaplan. But, I did. Yes it was 1300 for summer prep classes but it raised my score 16 points and I def think that paying a grande or so for that is worth it considering how much 4 years of tuition will set you back. I'd just like to put that out there for anyone else asking aobut Kaplan, it's not some horrible money pit (at least my local one wasn't).
he said they inter-spliced real questions with made up ones. His argument was that these master brains at Kaplan are so familiar with the test they have the ability to make up their own questions.
As for TM v PS v Kaplan, I'd say stick with what you've already paid for. I have seen all three programs, each has its merits (except TPR... muahahahahhaaa) but Kaplan has the best online stuff, test explanations for every question and the Higher Score Guarantee. My question to you is have you been using the Pacing/Endurance/Mastery books? How much work have you put into the class?