Ana and Oscar's place is a true gem! It is close to everything so that we rarely even took the train. I have a brand-new artificial hip AND knee and I found this part of the city to be so walkable (and the bed so comfortable) that I never took a medication for pain!
The apartment itself is clean, beautifully appointed, and the balcony is an amazing plus. Every night my daughter and I sat out there drinking wine and watching the world go by. (Yes, bring ear plugs to sleep.) We very highly recommend this for anyone's stay.