The location is great. It is located in the centre near to the main attractions (Plaza Mayor and Puerta del Sol) and a lot of bars. Therefore it can be very noisy on the weekend (not only in the streets but also the neighbours) although we only spent Friday night there. The apartment was also very clean. Because it is an apartment specially for tourists with a short stay you can´t expect more than the basic utilities. For example there were just 1,5 toilet papers for 4 people. If you need more or any other equipment you have to buy it yourself, which is a pretty bad service in my opinion.
Also the bathroom and bedroom door can´t be closed. So be aware of that before booking. Further there is no possibility for the sun to enlighten the appartment. But the most important and totally unacceptable was that the sofa bed in the living room was broken. It is impossible to relax after a busy day and to wake up without having back pain. This should never ever be an option to sleep!
In total the Apartment was a disappointment and I don´t recommend it for more than 3 people, which want a comfortable stay.