Ruy was an excellent host and the apartment was exactly as advertised. Ruy was attentive and easy to talk to, and really knowledgeable about Buenos Aires (he's had experience living abroad, knows the local area, and is bilingual); he was helpful and offered great assistance (for instance, changing US dollars to Argentinian pesos, which can be a little hair due to the different exchange rates, and calling a cab to Puerto Madero - I got a really talkative, friendly cab driver who was a joy to speak with).

The apartment itself is cozy, well-furnished, and the noise level is easy to control - the noise of the city life is right outside, but if you want quiet, it's as simple as closing all the windows. Everything worked well, including the wireless internet, which I had no trouble with. A few outlets in the house didn't seem to function, but that was trivial and easy to overcome. Additionally, the location is great - everything you need to, well, live, is pretty much within three blocks, and the view is great!

Overall, my stay at Ruy's apartment was great and I wouldn't hesitate to do it again. I would highly recommend it.