Thanks Gmat club for the free practice test. I have been practicing questions from Gmat club from quite a while now. But, I don't feel I prepared enough for the tough questions.
The quant section of GMAT Club Test is really good. The questions cover all the gmat topics and are a good mix. I personally found them a notch harder than the gmat prep questions. The verbal questions are not bad either. The SC and CR sections are the same difficulty level as gmat prep and the RC are a bit tough.
Overall, I recommend everyone taking the GMAT to use it for their preparation. It is definitely worthwhile and help you identify the sections in which you are weak.