The apartment on the 4th floor is a snug 1BR. To host more people is more than a tight squeeze - but I supposed living in the UWS people would expect nothing less. The amenities in the apartment are very nice, and during my stay the place was very clean. The noise and the grime in the area (streets and sidewalks) was a bit disheartening, and speaks probably to poor city management and a lack of concern by the neighborhood and citizenry. Nevertheless, it affects the "feel" of the stay there. As an example, the amount of dog poo on the sidewalks was insane.
Izi has a team that helps maintain the building - they are incredibly helpful, courteous, and respectful.
I stayed at Izi's apartment for 3 months and had virtually no issues. Like I said, the amenities in the apartment were great, and I had no problems whatsoever.