We really loved staying at Daniel's place on Arcos. It was well-equipped with everything we needed to enjoy our stay. The apartment was clean, well-organized and generally quiet. The location was absolutely ideal: near a busy street (Avenida Cabildo) but on a quiet, leafy corner. Daniel was generally very responsive -- when we had a hot water problem, it was handled within hours -- and his flexibility with our checkout was extraordinary. A second set of keys, which we had requested but never received, would have been helpful. Nevertheless, we would gladly stay at Daniel's place the next time we are in Buenos Aires and give him our highest recommendation.