My family and I just finished up two nights at Marlyn's apartment and we were very happy. It actually feels bigger in person than the pictures and with a family of four, we didn't feel cramped during our stay.
We especially loved the location. We walked to multiple awesome restaurants and shops in the area (Vintage Harlem Wine and Spirits, The Fox, Harlem Burger, Double Dutch, Bo's Bagels, Dunkin' and Jin Ramen), the metro stations are very close and we had no issue parking on the street as we drove in for our visit.
It is an older building (charm galore) and NYC is a busy city, so don't expect total silence as you head to bed, but none of the noise was unexpected or bothersome.
Finally, Marlyn and Samaras were very helpful in letting us drop our bags off a bit earlier and Samaras even checked in with me later to make sure everything was to our liking and if we needed anything else.