Some students achieve high (650+) scores before they even begin studying. So, for those students, the MGMAT books might be enough to score 700+. Other students require much more practice, in which case the official guides are the BEST.

Have you taken a free (official) practice test (https://www.mba.com/the-gmat/download-fr ... tware.aspx) yet, to get a baseline score?

I always tell students to take a practice test VERY early in their studies (within the first week of preparing). I do this for several reasons:

- Students should know, as soon as possible, exactly what they will be preparing for over the coming weeks and months.
- The results of this test help students gauge the amount of work required to reach their target score.
- These practice tests help build confidence, since scores inevitably improve as the student prepares.

If you're interested, I wrote an article for BTG on the importance of taking a practice test early in one's studies: https://www.beatthegmat.com/mba/2013/05/ ... st-already

I hope that helps.

Cheers,
Brent