yeah, its brooklyn.
The center is located in Midwood, Brooklyn...to get there, take a Brighton Beach bound Q or B express train (the B runs express in Brooklyn, I'm not sure about Manhattan) and get off at the Kings Highway stop. You will be able to see the center from the platform, it is VERY close to the train. I think it's on the corner of Kings Highway and 14th st., but I am not sure. It is on the third floor of the HSBC building, so you will most likely see the HSBC sign and not the Kaplan sign, but they are located in the same building.
Unfortunately, I don't think I will be able to go (I am teaching a class until 5:15 that day), but I think it would be fun to play 'lawschooldiscussion.org challenge' and have a few of us take the test and see who scores highest...