Family of four (two small kids), had the pleasure of staying here for 4 nights. The flat is situated at the most strategic place in town centre inbetween Sol(M), Market, and Opera(M) all within 5' walk. All the things you want to see as a tourist are in fact within walking distance. All the places you want to eat also! The flat itself is perfect for 4 (one double bed and a sofa bed both very comfortable) There is a small balcony with two chairs that we enjoyed every morning for coffee and night for a glass of wine watching people walking around and dinning. The kitchen is fully equipped and modern. There are two airconditions in each room that made all the difference in the hot weather of Madrid! There are blinds that darken the place to your liking!
The place felt safe, there are three locked doors!
We met with Arantxa's sister Amara who spent some time explaining how things work around the house and also gave us some tips about things to do and see in Madrid. She gave us a tel contact in case we needed anything.
The only downside is the noice level in the flat from the surrounding bars and in general from the traffic around the house. We were fully aware of this before booking, and Arantxa also made it very clear to us so no complains. It is a small price to pay given the hugh convenience of the location of the flat. having said that both kids and myself slept all nights no problem (without earplugs). My wife however on Sat night found it impossible to sleep (no earplugs)!
Overall I would book with Arantxa again as I found the location superb, that allowed me to make the most out of my stay in madrid without having to use public transport and waist time trying to get to and out of town!