I also received a PM asking me to respond.

Completely agree with everything Jim said. The other thing that's useful to understand from a practical standpoint: you're going to get questions wrong on this test - you can't get around that. The key to a very high score is to get the very hard questions wrong instead of the somewhat hard questions.

Our mindset on paper-based tests in school was to try to get everything right. You don't want to use this same mindset on a CAT. Instead, think of the CAT more as a tennis match: you can't win every point, right? Sometimes, your opponent's going to win the point. When that happens, think "good shot" and move on to the next point. Don't dwell on the previous point. Also, don't kill yourself running side to side, trying to salvage a point you're probably going to lose anyway. Lose the point right now and save your energy for the rest of the match - after all, you can still win the match even though you're going to lose some points.

lol - the GMAT is a special player - it's just as good as whoever it's playing against at any given moment.