When I booked this room I somehow thought I’d be sharing somebody’s home. Instead, it feels more like a pension, with all anonymity attached to it. I didn’t meet Cristina personally.
As written in other reviews, the room is indeed very small, sharing it with another person could be a challenge (I took it on my own). I’ve seen an even smaller room in the same facility without a window except for an opening towards the corridor. All this is not a problem if you’re outside all the time.
It’s not really a “hanging” place as there’s little space. Also, I would not consider cooking here (quite small facilities but supermarkets are close by and it’s definitely possible).
The building and other guests may be quiet though the window opens onto a busy and noisy street with a lot of cafés, and waste removal happening twice every night (around midnight and between 2 and 3am). It’s not smelly but quite loud. This may give you an authentic feeling of what it feels like to live in the center of Madrid but be prepared to be waking up a couple of times during the night (closing the balcony door would be an option but it was quite warm when I was in the city).
Cleanliness was average but kitchen and bathroom which are shared between the three or four rooms seem to be cleaned once a day.
The plus point of this place is definitely its centrality. Pretty much everything you may want to visit during your first stay in the city is in walkable distance.