I strongly recommend hernan's place. It's perfect for couples or single travellers. It's very clean, comfortable, perfectly located. U'll be two or three blocks from plaza italia's sub station. Besides, palermo, where the apartment is located, is a beautiful neighborhood. Nearby, you can find little street markets, nice restaurantes, great parks, bars. On the other hand, it wasn't noisy and the street is quite calm.
Hernan was a great host. He arranged everything in a fast and helpful way. Very easy to get in touch with him, always available.
I would definetely stay there again. Thank you very much!