We only stayed in Javier's apartment for one night, but it is in a great location, so close to the major sites/museums and train station, which made getting back to the airport super easy. The apartment is small, but very cozy, well decorated, and clean. There is a small balcony as well that lets in plenty of light. There are two single beds, which were pushed together for us - not ideal, but works, and would make it easy for two people to sleep separately as well. Javier is also so incredibly responsive to messages - responds minutes later, which made the whole check-in process super easy.