I don't have any idea about Maths Revolution as I have never used its products, but I did use
e-GMAT for my entire GMAT preparation, and on that basis I can tell you that their Quants material is well made.
e-GMAT's questions, their numbers and their detailed solutions are sufficient for learning concepts and tackling various problems. Furthermore, its Application question feature, which I believe is the best part of their service, shows a student how
e-GMAT experts solve questions, helping students to approach questions methodically. Also, its student support service is quick to solve any doubts. Moreover, its question Forums are quite active, and thus offer plenty of opportunities to enhance knowledge.
So ultimately it's on you to derive maximum learning from their service. As long as you focus on building concepts, follow their approach for problem solving, patiently Read through Forum posts and especially analyse every solution to a question thoroughly,
e-GMAT's Quants product will provide you all the know how and toolkit to get your target score.
Overall,
e-GMAT's Quants service is fine, but you should take some time out to decide for yourself whether it will serve your purpose or not by trying their trial version. However, their trail version only offers video lessons, not the Application question feature, which I believe is the best part of their service as it shows a student how
e-GMAT experts solve a question, helping students to approach questions methodically.
If there's anything else that you want to know, feel free to ask.
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