I travelled with my 5 month old to Madrid for a close friends wedding and I couldn't be more happier to have stayed at Javier's apartment. The location.. space.. cleanliness..comfort.. everything was excellent. Its quite a modern place and well furnished with everything you might need for a short/long stay. Some of Madrid's main attractions are at a walking distance..puerta del Sol, plaza Mayor..some great restaurants and all the major shopping.
We felt comfortable and at home in Javier's lovely flat. Would recommend it.