Good guide for GMAT, especially Quant test cat

Gmat Club is very good platform, it provides us all the necessary information, study material, and practice question/test at a one place. It has very smooth navigation, user friendly site and app. I would recommend every gmat aspirant to have it.
I use it to hone my quant skills and it is perfect to sharpen my skills. All the solutions of questions have very detailed and informative explanation. Also it provide us to write down our own short cut method which help us and others to know more about different different approaches, which is very useful for learning purpose. One more thing I would like to add in my review that their service is excellent, once I had a issue regarding my subscription and I mailed them for the same and they solved it within an hour which was so impressive to me.