Fantastic apartment. Very clean, lots of light and windows, which is always important, incredibly quiet (even with windows open!), fast wifi, etc.
The Carnegie Hill location is awesome, above two restaurants (one with a great bar!), across the street from a great coffee shop, and a short walk from other necessities and the subway.
Evan was very responsive, answered all of my questions, and offered advice when necessary.
Perfect spot for a short stay in the Upper East Side. Highly recommended.