e-GMAT's verbal online course is an excellent resource for anyone who aspires to solidify his/her understanding of the GMAT's verbal section. What sets it apart is the depth of the content offered in the course. It's extensive and meticulously prepared.
My primary motivation to take up this course was to reinforce my foundations in sentence correction as that was the one part where I was struggling with the most. e-GMAT's verbal online course was instrumental in driving the point that a correct sentence should have only one correct meaning and that there should be no scope for ambiguity. Although I was familiar with this concept, the tutorials and questions provided in scholaranium helped me bring further clarity in an exam setting. The improvement I noticed in sentence correction also helped me improve Critical Reasoning.
In a nutshell, if you are a non-native English speaker and are struggling with fundamentals, this course is a life saver. They have provided an excellent collection of questions to hone your skills. The one area where I felt e-GMAT can improve is to provide quicker feedback on scholaranium although I can imagine this is an uphill task due to the popularity of the course.