Well, I fell short of my 700+ goal, but I think I'm pleased enough with the score to move on with my life.

Score Q V
GMAT PREP 1 (pre-studying) 650 41 38
GMAT PREP 2 660 41 40
GMAT PREP 1 (Attempt 2) 680 44 40
PowerPrep 740 47 44
Test #1 640 38 40
GMAT PREP 2 (Attempt 2) 700 46 40
GMAT PREP 1 (Attempt 3) 700 43 42
GMAT PREP 2 (Attempt 3) 720 49 41
Test #2 660 42 38
MGMAT Free Test 690 45 38
GMAT PREP 1 740 49 41
Test #3 690 44 40

Before starting my studies I took the first GMAT Prep test and scored a 650, so I was a bit disappointed when after studying for a month and a half and scoring a 640 on the real test. I almost threw up in the bathroom at the testing center before taking the test. My nerves certainly negatively impacted my actual test scores.

I took a month break and then studied for another month (10-12 hrs/wk) and scored a 660. An improvement, but still disappointing (I knew my practice scores were inflated because of retakes, but 660 was too low).

I then took another month break and studied for a few more weeks before taking it my 3rd and last time. 690. I do feel that I'm closer to a 700-710, but given my past experiences, I'm sufficiently satisfied with my score to move on. This test has definitely sucked some years out of my life.

Moral of the story ... don't give up. You can improve your score (although I wasn't as fortunate as those who have improved by 100+ points).