We´ve spent 10 days at Flo´s place and it's been absolutely perfect.
First of all, the apartment is amazing (even nicer than shown in the photos): beautifully furnished, comfortable and extremely clean. Kitchen might seem a bit small (it is, indeed), but it´s perfectly equipped. The bedroom and living room are truly spacious. There´s not an elevator in the building, but the apartment is located on the second floor, so it is not a big issue.
The neighbourhood, Fort Greene, is cozy and full of life, with plenty of shops, bars and restaurants (great coffee at the coffee shop downstairs!).
The connections are extremely good: C and G lines literally downstairs, and almost all the trains that you need for Manhattan in a 10 minute walking distance from Atlantic.
Finally, we must say that Flo (although we didn´t meet him personally) was a perfect host - answering our queries promptly (thanks!).
To sum up, it´s a perfect place if you want to explore NY. If I ever come back (hope so!), I wouldn´t hesitate to stay at Flo´s apartment again!