GMAT CLUB TESTS Quant

It is a great tool in preparation.
It would keep you grounded with more tricky questions, but it will eventually get you into a habit of looking at all constraints which is very important for quant.
The analysis provided after the test is great. You know what topics you are getting good at.
I am writing this review while preparing for GMAT Classic, I am not sure about GMAT Focus but I am quite sure, that would also be close.
One tip would be trust the solutions given. They are the best ways to go about questions. This learning will take you places.
If you are nearing your atempt, this can be a good tool for sectional practice.