Everything was perfect.
The flat is super clean and has everything one needs. Plus it's never cold (we were there in November, and we stayed there in the past in December).
My partner and I worked from there for a week. We both had meetings and calls and we never had a problem with the WiFi.
Francis and Inma are super kind, friendly and helpful. They let us park the bikes we had rented inside, they let us use their umbrellas when it was raining.
The location is just perfect: in a quiet alley a one minute walk from the center. One can get the neighbourhood vibe or walk to the hustle and bustle :-) Or to the coast!
We always had breakfast at bar Mariscal behind the corner (and now I know that a caffellatte is a cloud ("nube") and a small sandwich is a smurf ("pitufo") ("pitufo mixto" comes with butter, ham and cheese)). We also tried the small Mexican restaurant that is in the same alley as the flat and we really liked it.
Malaga is a great city, with many nice museums and a lot of bike paths along the coast. And the flat that Francis and Inma rent is a perfect place for two people to explore it! Totally recommended!
If we go to Malaga again, we will certainly stay there again.