The neighbourhood is lovely. You have beautiful looking streets and lots of nightlife options, if that's what you want.
If you prefer to stay indoors and sleep, it's considerably well isolated from the noise below. However, if you are a (very) light sleeper (like me), consider bringing your earplugs. I did so and the noise disappeared. The rest of my family had no trouble sleeping without earplugs; that's just me.
The views from the balcony are charming, just like in the pictures.
João took great care of us. Thanks! He made sure we were comfortable, was available for questions, offered suggestions as to where to eat and what to visit… Couldn't ask for more!
Oh, and the taxi driver that drove us from the airport to the apartment (booked through João) was real kind too.
There is no elevator to the fourth floor (and we knew that), but that was okay for us. If you have mobility issues, consider another location.
All in all, it was a great decision to go with Ana's place.