Economist GMAT Tutor - Review

Hi Everyone. I would like to start a thread to discuss the effectiveness of the Economist GMAT Tutor program.

Since it is as expensive as any class room coaching, I would like if any experienced users can share their thoughts and opinions about it as an effective learning medium.

So far I'm in the one week free trial and as far as I can see, its very effective. Has anyone taken a paid subscription and found good results?