If you ever find yourself in Madrid please give this amazing spot a look.
My girlfriend and I stayed here for a couple of days and could not have been happier with our selection. It is located close to the metro and the train station. It is also close to many cool destinations. If you want to take a taxi to get to places we found our longest ride was 10 minutes (to airport was 20) The house itself is spacious and very cool. You will find yourself not wanting to leave.
This is one of my favorite places I have gotten to stay in, defiantly check it out if it is available.