We stayed with my wife, 2 kids and a friend in the apartment. We really enjoyed our stay, checkin is a breeze, the apartment was clean and ready to host us. The only thing I would warn about is to families with small kids as the stairs can pose some danger if leaving kids un watched. Fernando promptly responds to messages/questions: the toaster broke during our stay and Fernando quickly replaced it with a new one on the same day.
Also be aware that there is no place to leave the luggage when you check out, but there’s a luggage storage a couple of blocks away.
Totally recommend, it has a great location with tons of restaurants, bars and things to do nearby.