I didn't try chess mentor but one my friend from chess.com paid for chess mentor and told me that chess mentor helped her a lot.On her last professional tournament about 10 days ago she did great result she told me that she is very thankful to chess mentor.
With my premium membership I got 10 free days of Chess Mentor. I used it as much as my schedule allowed during those 10 days and I noticed a significant improvement in my game. My rating here went up over a hundred points during that time, but more importantly I could tell that I had a better grasp of the positions as I played. I would highly recommend it and as soon as I can afford it I will get the yearly subscription!
I am a novice and I wondered how much improvement that people have gotten from the Chess Mentor Comprehensive course?
Thanks,
Jerry