Our stay in Madrid with El Tesoro was great as the apartment is near the city centre (by subway), all the sights are reachable in 15 min by public transport. They give precise instructions for the location of the place and the organisation once you have arrived .
Also, each suit is unique- the design never repeats the other room. It's cosy, comfortable,well-equipped. Next time we come back to the city, we know where to stay.
Thanks!