We spent 2 nights in Nieves's flat. She shared a tip on where to park the car and was understanding when - having troubles navigating around the city and parking - we arrived late. She was welcoming and friendly at the check-in and let us have a tea in the morning.
The flat is all renovated and looks nice, especially the (shared) bathroom. However, it's important to know that there's no AC or fans and with the sun out the flat warms up fast. In fact we couldn't sleep at night because of the heat.
We slept in the smaller of the 2 rooms that they rent. It has a bed and a little desk and faces a rather calm street. The windows protect quite well from the street noise but the walls and ceiling are quite thin so if you have light sleep like me, better to bring earplugs.
The thing that was most difficult for us was the bed.. The mattress is really soft and small (135cm wide) and kept sliding on the metal frame every time one of us moved at night, which made it impossible for us to sleep. After those 2 sleepless nights we left exhausted.