To start, I would have paid at least $400 more for 3 nights in a decent hotel in midtown. Check in was easy, the place was easy to find and the host provides detailed instructions. There are bagel shops, wine shops, food spots etc within a block or two. The closest subway is about a 6-8 minute walk (grand central). It is really not a bad location for getting around Manhattan and it provides a plus because there is very little street noise at night. Also I felt very safe here- there is a key pad to get into the building and into the apartment, plus extra door locking mechanisms within the apartment.
Our bed sheets were very clean (arguably better than hotels), bed was comfortable, rest of the place was also clean. Although there is no "kitchen" the host provides an electric stove top, nespresso machine, toaster, etc. Includes all utensils for cooking.
Seriously this place is worth it.