Max is undoubtedly the guru of GMAT math!
Before I took his program, I thought I'd be satisfied with math score of 50. However his teaching was so great that I made it through 51. What is most amazing with his lecture is that I could cast away the fear for Data Sufficiency problems. Completing his course, now I feel more comfortable with DS problems, with whose ambiguity most GMAT test-takers get pressured, than with PS problems. His 'variable approach' leads me through a shortcut to quick and accurate answer. Simultaneously his 'IVY' approach formulated robust and accurate ability to solve Problem Solving problems, so that I would not make mistakes that I used to make unconsciously in the real test settings.