This is a unique place, and made our trip to Buenos Aires quite special. We took full advantage of what was on offer with the house: we had a sit-down dinner for 17 people, hiring the recommended chef and staff; had massages in the massage room; spent time in the pool or sauna every day. We were 8 people total and never felt crowded -- quite the opposite, we typically had to use cell phones to communicate with each other to know who was home (it's a big! place). I have stayed in Airbnb's all over the world and this was unquestionably one of the most memorable. Darren and the house manager, Eugenio, were attentive, responded quickly to our communications, and were highly respectful of our privacy. Because this is a very large, and old, house, there is a good deal of upkeep that is necessary to keep things running smoothly. We had a few small problems (there was a small leak from the ceiling in a hallway one night when it rained, a couple of the (many!!) toilets got clogged, it took us a day or two to figure out how to regulate the heating to our liking. In all cases, Eugenio and Darren were responsive quickly and unobtrusively. Eugenio in particular deserves special mention -- he was friendly, thorough, polite, and efficient. When he said he was going to do something, he followed through. He really helped make our stay run smoothly.
Staying in the house made our trip to Buenos Aires (a fantastic city in itself). If you have a large group and want to live it up, I can't recommend it highly enough.