Let me start with the CONS:
1. You are in a living room, very little to no privacy with one bathroom to share among those who live there. There are two other residents living there (both men).
For you single ladies, I don't know if this is suitable place for you.
2. No Air-conditioning in this unit (it's summer in NYC), there is a small vertical fan keep this on you at all times if you decide to rent this unit. Is the only way you will sleep.
3. The sofa-bed is terribly uncomfortable, there is a camel-hump in the middle, where it forces you to sleep on the left-edge or the right-edge, never in the center.
4. Your on the 4th floor there is no elevator, you will have to carry your luggage up three (3) flights of stairs. Hope you pack and travel light? A 22 kilos+ suit-case gets very heavy after the first flight up.
Next the PROS:
1. Price for the four nights I was there for me was $85.50 per night (this includes all taxes, cleaning fee, ex.)! As everyone has every told you before. You get what you pay for and to be in the Upper East-side at this price-point is unbeatable.
2. Very responsive host, "Min"; though you never meet her in person. She is very quick to answer any questions if you need it. I would write her through the AirBnB app and within less than 2-minutes you get an answer back.
3. Subway MTA, 86th St "Q-line" entrance is literally 150ft (45 meters). It's very close to this unit for your convenience.