The best quick and sureshot course for the Non-natives

I wrote my first GMAT in Nov 2014. Typically confident of doing the preparation myself, i choose to climb the mountain called GMAT in my own terms. And then i was stuck on a plateau. Q50 and V18 - 570 on GMAT. I was frustrated and sad as the question "who can help me when i can't help myself?" went unanswered. And then i decided to go through reviews and try out Sample live courses. E-Gmat was one of these and the only one i ended up checking: I have found what i wanted.
I took the live course as it can help me with clarifying all my doubts spot on.

The Pedagogy:
The material and recorded lessons are tailored for the non natives and exactly serves those problems that we face.

In SC, the part i was particularly poor at, the course focuses on the areas that we normally make mistakes in: those grammatical mistakes that have become 2nd nature to us. It explains this in a way that does not need us becoming an english literature student.
RC and CR chapters did help me a lot in tackling different type of questions. Pre-thinking in CR did really help me to improve my score without much effort. My RC accuracy also shot up with a minimal effort.

I took the exam again in 2017 Jan with only 20 days of preparation and increased my score from 570 (Q50, V18) to 630 (Q49,V27).

Customer support : It is quite responsive and co-operative. I wanted to attend classes i missed and support was given almost immediately in re-taking those. Must say they understand our problems quite well and have addressed them in their operations.

Verdict : If you are a non native and want to improve your tallies in less time and effort, look no where else. Do well and best wishes for your exam.