The apartment is not owned by a person but a company that rents out about half of the apartments in the building and therefore lacks a little personal touch. Also there are many other tourists in the building. This leads to noise disturbance till about 3am.
It gets very hot inside and the vans don’t really help with that because they shut themselves off after 120min.
Apart from this the apartment is nice and clean and it is close to the metro. Fine for a stay in Madrid.