I spent one month in Claudia's apartment and it was great! Everything was like in the description, it was clean and everything worked how it should. The neighborhood is very safe and you're good connected to every type of public transport (if you want to take the subway, you have to walk for 15min. - bus stops are nearer). The kitchen has everything you need, just remind to buy salt, sugar etc. Since the window is on the street side it might gets noisy around noon and in the afternoon after work time. But during the night it's very calm. The janitor and the chambermaid are very nice and they help you whenever you need it. Also you have grocery shops just two or three blocks away.
I'd recommend Claudia's apartment to everyone who wants to feel safe or wants to relax in a huge city like Buenos Aires. And if you're looking for dance places (tango etc.) or just some cool bars to spend the evening then the neighborhood of Palermo is definitely the best for you.