Must for Q51

i have tried GmatClub test and scoring is very similar to actual GMAT .Although sometimes you find questions are quite difficult but this will prepare you for actual GMAT because you know some questions will be difficult in actual GMAT.Questions are very selective and every question has a new concept and has a full explanation for better understandings of concepts. Analysis of these questions with all reporting is very helpful .I would say this is the best tool I ever had for analysis of your mistakes , with Type,Time and Difficulty level provided this helps you to focus on your weak areas. This is really fantastic and must for GMAT takers.