Absolutely good investment!

I found Magoosh Verbal video lessons a great complement to Manhattan Verbal guides; especially for SC. Let me explain how it works. If you study a lesson or strategy in a book, it may not stick to your mind. But when you study a concept and few days later you face the same concept on practice problems, and then a week later watch a video lesson on the same concept, it would probably remain in your memory for long time. Magoosh video lessons; especially SC ones; teach you new concepts or deepen your understanding of newly learned concepts.

In addition, Magoosh offers a "Help" feature that you I found very helpful during my studies. You could simply email Magoosh experts and ask them anything. They also have video explanations for OG problems.

Nevertheless, I do not like their AWA section. They could have done much better on this section.

In sum, If you are a dedicated test-taker and willing to spend 2 to 3 months studying GMAT, I highly suggest purchasing Magoosh products. You have to listen to them and follow their approach.