I have taken my first GMAT prep on 26th February. The first score always becomes a surprise as we sometimes have over confidence being from engineering background. I also thought of scoring 600+ (at-least.) but was disappointed.
I managed a score of 540 (Q22, V22, IR6) and really struggled with time to complete the exam. It was tough to complete the exam on time as i had spent more time on few questions and made few silly mistakes which brought my score down.
This score made me think that I have to study much more and I have to work hard to get a 700+ score.