Great apartment in a great location - centre of Madrid and within walking distance to all major attractions of Madrid. The apartment is very modern and clean and has everything you need in it - from shampoos and shower gels and all the way to a great variety of spices in the kitchen. The small balcony in the living room and in one of the bedrooms made this apartment very special - great spots for nice pictures with an overview of Madrid. The master bedroom is located on the other side of the apartment which is very quiet. We had a wonderful and restful sleep in this apartment after exploring Madrid for the whole day.
The only thing that I would suggest to the owners and hosts is to have a proper cover for the mattress in the master bedroom as there is no cover at all, and change the bed linens from the synthetic to the cotton ones. We were sweating a lot throughout the night and were waking up all wet on a mattress with no bed sheet the next morning as we were spinning in bed throughout the night due to synthetic bed linens that did not allow our bodies to breathe throughout the night.
Other than that, the place is wonderful and is a lot better than on the pictures! Communication with the host was great, check-in and check-out process was also great and very easy. I would recommend staying at this apartment when visiting Madrid.