I really loved my stay at Nina's place! It's the perfect location for a long-term stay in New York -- you're literally a short walking distance from some of the most famous landmarks, like the Empire State Building, Times Square, Central Park, Bryant Park. The apartment is right off Fifth Avenue. It's spacious for one person, and can definitely fit up to two. I found the kitchenette useful, and cooked every day! There's also a dishwasher.
Some minor downsides: The common spaces in the building are a little dirty, and also the water pressure inside the apartment sometimes randomly gets super low for a few minutes, making showers/dishwashing a little annoying. Also, keep in mind the the apartment is completely empty when you arrive -- no hand soap, no toilet paper, etc.
Overall, this place has great value for money in an amazing location in Midtown Manhattan. I would definitely stay here again!