My stay at Yahaira's place went perfectly well.
Yahaira is a great host. She was very kind and responsive to all my questions.
The room was clean, very confortable, equipped with a TV and I had access to the wifi. The place was also very quiet, which I liked a lot.
It was very convenient to have also a coffee machine, a kettle, a fridge, an iron, and an ironing board in the bedroom. The weather was quite hot in NYC during my stay and the AC functioned perfectly well. The shared bathroom was great.
There is an elevator in the building.
Access to the public transports is very easy, a few blocks from the building.
If I have to come back and stay in Washington Heights, I would contact Yahaira with no hesitation.