The host is always very fast with responses and will explain you all you need to know. The best thing about this place is its location in the Centre, where everything is in walking distance and you also have Sol very near (metro and all the happening is there). We were a group of 8 friends and we each had our own bed (two were on a double bed). The apartment is not very big, but it is the same as you can see on the pictures, but that was not a problem for us, because you actually only sleep and shower in the apartment, otherwise you are outside enjoying Madrid. We would definitely stay in this apartment again.