Must for non-natives

I wrote GMAT last year and scored dismal 32 In verbal.I ordered scored from GMAC and upon detailed analysis I realized that Sentence Correction is my Achilles heel.I went through various offline and online courses and even completed entire Manhattan SC guide but my SC skills didn't improve.Upon introspection I realized that I need a guide and a mentor to help me hone my grammar skills.I went through various non-native GMAT aspirants' reviews and finally zeroed on e-Gmat verbal online course .And Boy! that was the best decision I made so far for for my GMAT preparation.e-Gmat's interactive videos made learning a fun exercise . My learning curve has never been so steep.
Thanks to e-GMAT