Recommended for Quant

I would recommend the GMAT Club Tests especially for who needs some more practice on the Quant section of GMAT. There are several challenging questions that can lead you to improve in a fast pace your quant score. In addition, the answer for each question was well explained and more than that, usually it showed the best and fastest way to solve the problems.
Moreover, the performance dashboard, well designed and organized, is pretty useful to identify the specifics subjects that one should to dedicate more time to get some improvements.
On the other hand, analyzing as a non-native English speaker, the verbal tests could be more complete. I mean, I needed much more practice on grammar questions, but the verbal questions database was kind of limited when compared with the quant one.