We really enjoyed Cristina's place. It's not new or full of bling, but it's comfortable, unbelievably spotless, genuine, and it is in a fantastically convenient location. Also, Cristina embodies the spirit of Airbnb, whereas every other place we've stayed at in Buenos Aires was managed by rental consortia or hosts who don't even live in Bs As.
Cristina was also very responsive and clearly wanted us to have a good stay. Two thumbs up for this host. Highly recommended.