Have you tried their online demos? That will probably give you a good idea of which one makes sense for you. I did the demo for PR's online course and it was pretty cool. If you register on the site you can do the demo.
Thank your response.
In fact, I don't try any on-line course. Only visiting free on-line tools, such as Princeton and Kaplan
, is to practice GMAT questions.
As for demos you mean, I don't know what it is.
How do you think about Princeton's on-line course?
I wonder to hear your comment.