The apartment was very nice and perfectly clean when we got there. A great size for traveling with a group. We were a group of 4 in the city to tour Columbia and NYU. There were 2 teenage boys, 51 year old mom and 76 year old grandmother so we needed plenty of space. Seith's directions on getting the keys were perfect. Yes, there are a lot of stairs but it isn't nearly as bad as I was expecting. It did feel a little awkward at first walking through the common area but we were fine with it after doing it a couple of times.
The location was great with Van Leeuwen Artisan Ice Cream one street over. The subway was easy to get to and it was a short walk, Uber or cab to everything we could possibly want to see.
I would not plan on doing any cooking in the apartment. But with all the restaurants and coffee shops you really don't need to cook.
There were plenty of clean towels but they were all upstairs in a closet so we had to look around for them before we could use the first floor bathroom.
Overall a really great experience. It was so much better than being jammed in a tiny NYC hotel room.