GMATCHPOINT wrote:I started my preps recently and, due to my heavy daily workload, I have roughly 2 hours per day (max max) to dedicate to gmat prep.

I have the following questions and I would like (if possible) to hear from someone that already took the exam

As everyone says that OG is the bible for a good gmat prep, lets assume that I work only on OG (ie not using any other book). Lets assume also that I go thru the OG (as many time I need) to fully understand and master let say..80% of it (would be it too much?).
Well, then I wonder if I would be in good shape to score btwn 650-700.

I know this question sounds a bit stupid, I just want to prepare my strategy but don’t want to waste time on super hard questions as I don’t need to get above 700. Actually 650 would be all I need.

Cheers!

yeah, if you're looking to score in that range, the official guide (along with its verbal and quantitative supplements) should be plenty for you.

just make sure that you're not concentrating exclusively on solving the problems - a focus that, in the big picture, is actually irrelevant: if you are blazing through these quant guides at top speed, then there's a chance that you're not learning enough from the problems. remember, you aren't going to see those problems again - but you WILL see problems that share common elements with them. therefore, those common elements - generalized "takeaways" from those problems, which can then be applied to other problems - are all that really matters when you go over the problems.

check out my advice about takeaways in
this post, and apply that advice to the quant sections in particular.