Gmat Club Quants test gives a holistic approach for GMAT. Questions are good with varying difficulty. The quant part of the CAT have the best questions. And it is not only the questions but also explanations given are helpful and provides many shortcuts and help improve core concepts. Frankly, It was somewhat harder than the GMAT quant questions, but helps in better preparation for the final test. And also, you can take the quant section or verbal section one at a time, which gives great flexibility when you are hard pressed for time. The question have been very thoughtfully made and check the clarity of concepts in an effective manner which exposes the test taker to their weaknesses.