We LOVED staying here with our two kids (under 3!) We were close to everything - Josephina's for coffee and croissants (and wine!) on the corner, very close to Plaza Vicente Lopez (the world's best park according to our three-year-old), gelato shops, grocery stores, the Recoleta Cultural Centre (free and amazing).
The apartment was exactly as it was described - the trundle bed in the library was perfect for lounging and hanging out. The property manager was wonderful - very responsive and so very helpful! We were used to living on a VERY quiet street at home, we could hear the the bus/truck traffic in the mornings, but we did not hear another person in the building even once.
We had the most wonderful stay and would recommend this apartment to anyone, especially folks with families! We wish we could go back!!