I stayed 6 nights at Mauricio's place and enjoyed it very much. The location is excellent: in Palermo neighbourhood (very safe one with endless number of restaurants and bars around), having all you need just next door (metro, super market, bakery and laudatory).
The apartment itself was perfect for my needs with the homey feeling I was looking for. Mauricio is really nice and gave me some local tips I was more aiming (this is my second time in BA, so sight seeing where out of my scope). He respond quickly to any question I had.
If you are couple or single travellers, I would recommend you to stay there, a very good value for the money!