I took my GMAT last week and scored 690(48Q/36V). Having been out of academics for the past 12 years I would not have got this score but for Wizako(4GMAT). Very rigorous quantitative and verbal coaching supported with excellent materials and exercises helped me in getting this score. Every trainer is well qualified and more than that extremely committed.
Special mention and thanks to Subashree mam's verbal session, they stand a class apart and anybody who is not strong in verbal (most Indians are!) should go through her coaching.
The best part about your offering is that you did not draw any boundaries to your classes or your advice in preparing for the final exam including practice tests, test taking techniques and making available your alumni to share their experiences were more than what I signed up for.
I would strongly recommend Wizako to anyone who is seriously considering great scores in GMAT. When you can help a candidate like me to get a 690, I can now understand how you have made achieve those long list of 700+ success stories! Thanks a bunch!