Simple Approach, Exhaustive & Excellent

I signed up with TTP when I had already given GMAT once and scored a Q46 in it. And I needed a bump on that quant score. The beauty of TTP is that they keep the focus on simplicity, irrespective of the difficulty of question. The sheer exhaustiveness of the course including 100+ questions on crucial topics such as number properties, geometry make sure that much of the formulas, concepts become second nature to you. These really help when you're operating under timed conditions. Highly recommend TTP for Quant.

And as a side note, their free verbal module, especially SC, is superb as well. It may require a certain degree of base knowledge, so maybe more suitable for native speakers, but it is superb in terms of going the distance in explaining the things. Subjunctive vs Indicative; Parallelism; Modifiers. It's a bonus