I wrote one of those testimonials!
I usually don't bother with reviews or testimonials but I was very pleased with the experience and results (Q 46 --> 48 when improving on Q seemed impossible at the time).
I only engaged TTP for Quant tutoring (and I found them on Craigslist believe it or not...). My tutor was Jeff and we met over Skype and WebEx. After my first exam sitting, I was at a plateau - the subjects I was struggling with didn't see any improvement until I started working with Jeff @ TTP. They also have this book that I was given access to in a platform that reminded me of Dropbox. The book was a little rough (a few typos here and there) but they're working on getting it ready for publishing. The "eBook", if you will, was really great in leading me through a logical sequence of steps to mastering each quant topic.
What I learned most from TTP was Number Theory. I was never taught this (despite taking math courses through Calc II) and though it is not terribly difficult to understand, it was completely foreign before they took me through the paces.
I would recommend giving them a call - don't be put off by the somewhat cheesy website... and don't tell Jeff I called his website cheesy...