Wow, really? I had no idea it was so affordable. My rent is more than double in SF but figured it was a comparable CoL city to NYC/Brooklyn included.
However NYC as a whole has high sales and income taxes though. Including City income tax.
Brooklyn is where you live when you move to The City without a lot of money - like for grad school.
Rent is (probably) higher in Park Slope or Williamsburg though which are more "desirable" areas of Brooklyn.
I'm sure natives can chime in.