These are my comments for V-study Material:
- Very bad impression
- Very Old questions
- No explanations, only answers
- Some errors in the answers
The GMAT is changing, more probabilites, combinations, permutations, bold face questions...
I will say those materials are good to use like an additional ressources, but today material such as Kaplan
, PR and the OG are much better because they have answer explanations which helps us to track more our errors and to analyse every mistake. If you have time, I will attack V-study and GMAT plus, but in my own point of view, working with OG, Kaplan
and PR is enough to provide the score that you want....