Adrian was one of the most attentive hosts we've had with Airbnb. Every question was answered quickly and was straight to the point. His friend Giovanni acted as first contact and taxi driver for us and was a helpful guide in pointing us towards areas to visit and things to do.
The apartment is ideally located just behind Plaza Constitucion and is just a shortish walk from just about all the major sights. Plenty of fab eating and drinking places just steps away. It is on the second floor, has absolutely everything you could need including aircon in the living area and bedroom. The kitchen is well equipped and has a washing machine which came in handy.
The only issue we had was noise from a hostel a few doors down which went on into the small hours on most nights. There's little Adrian himself can do about that but it might be worth bringing earplugs just in case. We mentioned this to Giovanni on the return trip to the airport and he promised to take it further.
The apartment is in a residential area and is very homely and comfortable.