A good collection!

Highly recommend for those learners who seek to score +700 on GMAT. You will find the Math part a little bit more difficult than the actual test, but it's a good training for those who want to score +50 on Quantitative. I tried to learn more simple questions from other sources and came here for extremely tough question! The explanation are really great, you will learn a lot from it. The more I can learn, the more I feel confident on the upcoming text. Don't be bothered by the practice result because you might find it much easier on actual test. The Verbal part is pretty good, too, even though you might the Reading quite tough. In overall, I would recommend this product!