After finishing the 10 week self-study, I wrote the gmat yesterday and got 770! Better than expected, I found the manhatttan practice gmat tests somewhat harder than the real thing, mostly in the quant section. I studied about 4-5 hours a week on Sundays, doing the readings and recommended OG problems. After the 10 weeks of the program I wrote more practice tests until writing. Overall, my practice tests were:
Manhattan Gmat practice 1: 590 Q32 V39 (before studying, completely ran out of time on quant).
Man. gmat 2: 640 Q38 V38
Man. gmat 3: 720 Q47 V42
Man. gmat 4: 690 Q47 V37
Man. gmat 5: 740 Q47 V45
Man. gmat 6: 710 Q42 V 45
GMAT Prep 1: 760 Q49 V46
GMAT Prep 2: 750 Q49 V44
Official Score: 770 Q49 V47
Good luck to everyone