We had a great time at Arturos apartment, great location (7mins walk to subway) with lots of lovely restaurants nearby, really clean, comfortable bed, great shower and nice balcony.
Arturo was very pleasant, communicative and allowed us to store our luggage there before checking-in. (we arrived in Madrid early)
It's a comfortable place with the bare minimum needed for a pleasant stay.
One thing, which is why I am knocking off a star, is that we had exactly that.. the bare minimum of condiments. We had salt&pepper but no sugar and no wine/bottle opener, which I know isn't a biggy, but if staying just for 2 days, to have to go out and buy these bits may take from the overall experience.
Would I stay again? yes 100%, as I mentioned - Arturo is a great host! Next time I would just hope there might be a few sachets of sugar to go along with the delish coffee pods he provided :)