Beautiful flat, close by to everything.
There is amazing sunlight in the morning and even all the way to sunset. The place is well furnished with everything you need. The only issue was the 4 story walk-up, which is really 5 story in Europe. If you have a stroller, it's tough. I would recommend bringing an umbrella stroller instead of a full size. Fernando furnished us with a Pack and Play so it worked out really well with our 15 month old. She slept well in her own room. The street noise while sleeping wasn't bad at all considering you are so close to everything. Shopping is convenient and cabs are plentiful to get around.
We had to stay an extra day because of a massive snowstorm back home, and Fernando graciously allowed us to stay an extra night. Communication was great via WhatsApp. Internet speed was great as well, much better than hotels. All in all, a great trip, if a little rough with the stairs.