It was our first Airbnb experience, so we didn't know what to expect, but thankfully, Violetta was an excellent host! Her responses were immediate and she was always willing to answer our questions thoroughly.
Entering and getting the keys was easy thanks to a 24/7 doorman (we were arriving in NYC quite late, so this was an important perk for us). The building itself is very quiet and has a nice feeling to it.
Violetta's penthouse apartment is huge for New York standards - it's a true one bedroom with a spacious living room. The terrace offering views of the city skyline is a nice bonus, but we didn't use it as much as we thought we would. Everything is very clean and the king-size bed is really comfortable. The kitchen (with a window) and the bathroom are well-equipped.
The location is excellent, just two blocks from the 1 subway that takes you pretty much everywhere on Manhattan. There is a Starbucks across the street, a bakery, a pizza place and many stores nearby. UWS is full of people even late in the evening and we felt very safe during our stay.
All in all, I highly recommend Violetta's place - it's comfortable, clean and at a great location. The hostess is very accommodating, quick to respond and seems like a really nice person.