We have spent fantastic 10 days in Patricia's flat and I definitely recommend it!
It is very well located, close to three metro line - most importantly close to the Blue line (Parque) which we used the most. There are many grocery shopping and eating options in the area. If you would like to use a gym the hotel across the street has a monthly pass (30 EUR at the time of writing).
The apartment was clean (and we were given a mid-stay cleaning, because of the length of our stay) and very well equipped. We used the washing machine way more than we thought we would be. Loved the table in the kitchen!
The air condition was very much appreciated - each room has an independent unit and we used quite a bit. All the bedrooms have windows that overlook the street and while there is some noise coming in it definitely didn't disturb us. The bedroom windows have effective black out blinds which were appreciated as well.
Patricia was very responsive and very helpful. We appreciated the welcome box (thank you!). The smart lock in the door helped us go out and come back independently, despite there being just one set of physical keys - very practical.
One small nuance, that you might want to consider is the particular setup of bathrooms in this apartment, that might not suit all groups. One bathroom is inside on of the bedrooms and the shower is exposed to the bedroom. The other bathroom is in the 'public' part (kitchen/living room) however has sliding door that does not give the sense of great isolation (acoustic isolation, mainly). I think that close friends and families should be completely OK (like we were).
Overall the flat was as comfortable, stylish and clean as we expected from the pictures and description. The location, shopping, eating and communication options were even better than expected. The (not so big) distance from the very center of the city didn't bother us at all.