I stayed 3 nights at Rosa's place and it was surely a great and affordable choice !
The apartment is spacious and comfortable - not a typical closet-like room which is common for NY ;) everything is as described.
The location is calm and safe at night, but lively during the day (lots of shops, some nice bakeries, while Brooklyn's hipster-like bars are also within walking distance). it is also easy to get to downtown.
Rosa was also a very helpful host, easy to communicate with and quick to reply.