I stayed for three weeks in this lovely apartment in November and December, and it was perfect. It's exactly as pictured and described on the site and is very well-equipped, well-stocked, and comfortable. The reliable wifi made it very easy to work from the apartment. I really liked the slightly-quirky building and its excellent location - it has easy access to the Parque Madrid Río and the Parque Casa de Campo (great for runners). If you visit, check out the Goya frescoes in the Ermita de San Antonio, which are amazing.
Lila was a super host, very friendly and helpful, and always quick to respond to messages. Many thanks, Lila!