Tiffany is absolutely wonderful and we had a great experience staying here. She's very easy to reach and responds quickly. Tiffany was very flexible with us on check-in/check-out. Despite a small mishap with the keys (which wasn't really an issue, and she was very apologetic), everything was handled perfectly and was no effort for us at all.
The place itself is small but functional; you're taking one bedroom in a 2bd/1ba apartment, but no one was in the other bedroom when we stayed so it was basically a private apartment. The A/C works well so the weather is no issue, and the beds are quite comfortable.
Only one minor issue with this place: the shower is a little dirty—not disgusting, but if you're sensitive to this I'd bring shower shoes. The age of the building combined with the warm Manhattan summer means it's not unusual to see a couple critters scurrying around the place, but I don't think it can really be avoided.