The best online courses available for non natives

The egamt course is one of the best online courses available in the market.

The SC course in particular is great.
I can certainly tell you that e-gamt 3 step process is the best way to approach SC questions.
(I have been to couple of gmat classes and also have attended other companies' online courses -the trail courses)

Understanding the meaning is the key and following the e-gamt 3 step process, one can certainly finish SC questions with ease.
Remember that vertical reading for splits and just studying the grammar rule alone wont help you crack 700 level questions.

All the concepts will be explained and at the end of each concept file there will be a quiz that is really helpful to test our skills.
(This is not only for the SC section, but also for CR and RC sections.)

The best part about the Live prep is that you get to attend sessions that are very very important. Concepts will be explained and tutors will solve 700 level questions with you. The best of the tutors will be there to help you.

I will recommend this course to anyone who wants to improve get a big score in the GMAT.

In short, I would describe the course as worthwhile and well worth the money.