Lovely apartment, really light and spacious. Fifth floor but there is a lift so it's not a problem at all. Fantastic location for exploring Madrid. Ibiza metro is a few minutes walk and you can buy a pass at the airport. We bought a five day tourist ticket for 25 E. such good value. There's a well stocked supermarket DIA right by the Ibiza station too.
No complaints about the apartment except the shower is a little bit wobbly but works fine.