Great for Quant!

I used TTP program for two months. I think it is one of the most comprehensive courses in Quant. When I took my diagnostic exam and found my weak areas were algebra, geometry and rate problems, I used tried their one week trail for US$1. I was able to improve my score from late 20s, early 30s to 40+. I have to mention though that I used only 5% of their practice sections. These are critical to a great score.

The only downside I see with the amazing, comprehensive course is that it uses only traditional approach. To breeze through quant section you need to know alternate approaches like choosing smart numbers, backsolving, estimation and other ways of solving problems. I found them in @Bunuel's solutions, MGMAT books etc.

I would highly recommend this course in conjunction with GMAT club tests/questions.