great material

Gmat club is definitely a must-have in you study material. its added-value relies on its big 700+ questions database, especially in quant where you can get some challenging questions. It enables you to get ready for the worst. Also the profusion of CAT's, especially in quant (again) makes one's study plan super flexible. The fact that you can take quant and verbal separately allows one to work on its own strength.
The multiple advices provided by all the club members on the forum threads gives you great tips and shortcuts.
I would definitely recommend Gmat club to all the future test takers willing either to get a strong base on the main topics, or to ace it completely.